
Navajo Silver Jewelry
Handstamped Sterling Silver
Bracelet Set with Natural Malachite
Size - 6 7/8
Opening - 1 1/4"
Inner Circumference - 5 5/8"
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For a time,
the ever-ingenious Navajos found a way to secure additional supplies. Cardboard
ration tickets, which were used to obtain food supplies, were distributed among
the Navajos as they passed through a gate into a corral. They quickly learned
to forge the tickets and, when the government substituted stamped metal ration
tickets, those were also forged. A few Navajos had learned to work metal prior
to their arrival at Bosque Redondo and others apparently learned while there.
These men were undoubtedly responsible for at least some of the forgeries. It
was reported that at one time as many as three thousand extra tickets were being
passed around. The army finally sent to Washington for elaborate metal disks
that could not be copied.
In The Navajo, Ruth Underhill suggests, "When we look for the origin of
silverwork, perhaps this craft [the forgeries], developed under stress of hunger,
may point to an early inspiration." Prior to the coming of the Spaniards,
the Native Americans of the Southwest had no metal or livestock. The Navajos
were undoubtedly envious of the strange new enemies who rode horses and had
guns, bridle bits, tools, even silver-decorated bridles and saddles. And, even
though many of these items were procured through raids, the Dine' must have
wished for a steady and reliable source. Learning metalsmithing, however, would
have required tools and materials the Navajos did not have, and the Spaniards
were sworn enemies. Contact was far too brief to allow even the quick-learning
Dine' to acquire Spanish skills. At what time the Navajos actually learned to
work metal is debatable. Some say it happened before the Long Walk, while others
differ, but it is generally accepted that one of the first blacksmiths was Atsidi
Sani (Old Smith), or Herrera Delgadito (Little Slim Ironworker), as he was known
by the Mexicans. Margery Bedinger states in Indian Silver that "In about
1850 [Atsidi Sani] journeyed south to a Mexican settlement near Mount Taylor...
and persuaded one of the inhabitants, Nakai Tsosi (Thin Mexican), to teach him
how to form the black metal."
If not the first Navajo blacksmith, Atsidi Sani was the most prominent, and
probably the most proficient, of that era. Noted for making knives and bridle
bits, he would teach his craft to many Navajos, including some of the men at
Bosque Redondo. Most of the early metalwork was utilitarian, but buttons, rings,
earrings, belt pieces strung on leather, and a few bridle ornaments were also
made. Multiple bracelets of twisted metal were often worn on one arm; others,
hammered out of copper or brass, had lightly scratched, simple designs. Navajos
had worn silver ornaments and sported silver bridle decoration for at least
fifty years, but those articles were of Spanish origin, either traded or stolen
from Mexicans, or taken as spoils of war from Utes or Comanches. In 1853 (eleven
years prior to incarceration at Bosque Redondo), Indian Agent Henry Dodge moved
into a newly built stone house near Fort Defiance, made friends with the Navajos,
and eventually married a Navajo woman. It is also reported that he brought along
a blacksmith and a Mexican silversmith. Many years later, the agent's aged son,
Chee Dodge, would say that "Old Smith [Atsidi Sani] came to the agency
to look on and learned some things." The supposition is that Atsidi Sani
learned or perhaps improved his skills by watching these men, but whether his
skills included silverwork is unknown. Those years were particularly chaotic;
raiding and clashes with other tribes were at their height. Therefore, the times
were not particularly conducive to learning a new craft, and silver would have
been difficult to obtain.
Atsidi Sani's great-nephew, Grey Moustache, is quoted as saying, "It was
not until the Navajo came back [from Bosque Redondo] that he [Atsidi Sari] learned
to make silver jewelry." And Chee Dodge would add that "The Navajo
didn't make any silver of their own while they were at Fort Sumner. How could
they? They were locked up there like sheep in a corral. They had only a very
little silver in those days, which they bought from the Mexicans." Several
newspaper articles published in New Mexico during those years made claims of
Navajo silverwork. "Navajos at Fort Sumner are skilled enough to make good
bridle bits and other articles of horse equipage in iron and silver," one
reported. "Amongst the chiefs now on this reservation, many are dressed
in comfortable and even elegant style, in black cloth and buckskin, well-fitted
to their bodies and ornamented with silver buttons of their own execution and
design."
The silver buttons were most assuredly not of Navajo design; they had been procured
from Mexicans for years. Furthermore, this entire account seems doubtful considering
the deplorable state of Navajo life during exile. One might suspect that the
editors, possibly influenced by corrupt politicians who were noted for their
greed-and-graft mentality, were trying to make living conditions appear much
better than they were. Historic photographs show the Bosque Redondo Navajos
poorly dressed in cotton clothing or wrapped in blankets against the bitter
cold. It is unlikely that even "the chiefs" mentioned in the newspaper
article would have dressed as described. If any did, they must have been the
exception, and any silver ornaments they possessed were probably trade goods.
It seems much more probable that the Navajos learned to work silver soon after
they resettled in their homeland. Atsidi Sari is generally considered the founder
of the silver craft, but whether he learned it from the same Mexican who taught
him metalwork or from another Mexican friend is unconfirmed. However, his first
students were his four sons who, in turn, taught others.
With peaceful conditions, Mexican smiths began traveling onto the reservation
to trade their silver for Navajo livestock. As the silversmith fashioned a piece,
the Navajo who ordered it would certainly have observed and perhaps even assisted
by working the bellows. Considering their propensity for acquiring new skills
easily, the Navajos must have recognized this as an excellent opportunity to
learn to craft their own silver ornaments. It has been recorded that they were
casting jewelry as early as 1870. Silver coins, acquired from soldiers at Fort
Defiance and Fort Wingate, were melted down, then poured into hand-carved molds
to create a particular design or a simple ingot, which was then cooled, hammered
into a thin sheet of silver, and trimmed to the proper shape. The learning process,
however, was still gaining momentum. In 1884 John Lorenzo Hubbell (the much-admired
Don Lorenzo of Hubbell Trading Post at Ganado) and his partner, C. N. Cotton,
hired Mexican smiths to teach silversmithing to the Navajos, and began furnishing
some of the coins used to fashion the silver ornaments. The first Navajo silverwork
was rather crude and quite heavy, but it showed a lot of promise. Designs were
symmetrical even though smiths had no precision implements; in fact, they had
few tools of any kind, often just a hammer, some files, and scissors or metal
snips.
Washington Matthews, a young army surgeon from Fort Wingate and the most noted
Navajo authority of the 1880s, recorded the tools and techniques used by Navajo
smiths. For anvils they acquired pieces of train rail, kingpins from wagons,
any old pieces of iron large enough, hard stones, or tree stumps. Forges were
made of mud or sandstone, the bellows from goatskin bags, and crucibles from
anything that worked stones with small hollows, tumbler-sized pottery pieces
made especially for that purpose, or iron pipes with one end flattened, turned
up, and sealed. A semicircle or V-shaped groove was sometimes cut into anvils
for shaping bracelets; the first molds were made from baked clay and discarded
after a time. Later molds were carved from iron, wood, or soft sandstone, which
was greased with mutton tallow to prevent sticking. Some of the first silver
items made by Navajo smiths were the buttons they had previously obtained from
Mexicans. Men's trousers, jackets, leather pouches, bridles, saddles, gun scabbards,
ketohs, or bow guards, the wide leather bands worn on the left wrist to protect
from the bowstring's recoil. and belts were adorned with these silver ornaments.
They also decorated the moccasins and leggings of both sexes, and women's blouses
had rows of them at the neck, across the shoulder, down the front, and running
the length of both sleeves.
Many bracelets were nothing more than narrow bands with notches cut on either
side; others were made of twisted wire or plain silver with simple designs scratched
in with a file. Conchas for belts were decorated with scalloped edges, punched
holes, and incised and stamped designs. Rings were simple decorated hands of
silver; earrings were large loops that passed through pierced ears. Silver replaced
the tin decorations on ketohs. Small silver canteen-shaped containers for carrying
tobacco were copied from rawhide ones carried by Mexicans. The headbands of
bridles were covered with wide strips of silver that almost concealed the leather.
Normally, a silver concha was added on either side, and a crescent-shaped ornament
called a naja hung from the forehead strap. Najas, adapted from those used by
the Spaniards, were worn on bead necklaces as well, and were often interchangeable
with those on bridles. Matthews also recorded the bead-making process which
began around 1870. By this time, the smiths were apparently turning from U.S.
coins to pesos for their silver; Matthews mentions that Mexican silver dollars
were used to form the beads. A peso was pounded into the desired thickness;
then a disk large enough to make half a bead was cut out with scissors. It was
trimmed and used as a pattern for the others. Half-circles were formed with
a mold and die; the pieces were strung on a stout wire in pairs forming full
circles and fastened tightly together. A mixture of borax, saliva, and silver
was applied to the seams of all the beads; they were put into the fire and all
soldered at one time. After cooling, the beads were blanched, filed, and polished.
Bead necklaces had become very popular by the 1900s. According to G. W. James
in Indians of the Painted Desert Region, "scarcely a man or woman of any
standing in the tribe does not possess a home-manufactured necklace of silver
beads." The "squash blossom" necklace was probably introduced
around the turn of the century. It was not mentioned by Matthews in the 1880s,
but was included in the Franciscan Father's Ethnologic Dictionary of 1910: "When
arranged upon a string or thong, each necklace contains from fifty to sixty
the finer, smaller specimens often number as many as one hundred beads. Usually
they have a large crescent-shaped pendant in the front center, and in the lower
half of the strand small silver crosses, and other flowerlike ornaments are
strung after every second or third bead. Necklaces of this kind are very much
prized by the Navajo and are certainly very ornamental." The most accepted
theory about the squash blossom design is that it symbolizes the Mexican pomegranate.
In A Brief History of Navajo Silversmithing, Arthur Woodward wrote: "It
is my contention that all of these beads were originally Spanish-American trouser
and jacket ornaments. . . . [The pomegranate] has been a favorite Spanish decorative
motif for centuries . . . it seems foolish to look farther afield for prototypes
of this highly popular necklace element. If one were to remove these buttons
or cape ornaments from the original garments and string them, the result would
be a fine 'old' Navajo necklace." The ornament was quite possibly misnamed
by a trader who thought it resembled a squash blossom.
The first decorations on silver were merely scratched in with a file. Later,
a stronger tool was used to cut deeper lines. The technique of "punching"
silver was adapted from the Mexican tooling of leather. Any sharp-pointed piece
of iron was used as a tool to punch dots into the silver. The first stamps were
made by cutting a piece of pipe in half to make the imprint of a semicircle.
Don Lorenzo brought steel dies, or stamps, to Hubbell Trading Post later, but
many smiths still made their own. The years from 1880 to 1900 have been called
the Classic Period in Navajo jewelry. The time of learning was over, but the
tourists had not yet entered the scene. There were numerous smiths on the reservation,
each making the items he wished to his own satisfaction. They used curved figures
and lines in their designs, and most used carved dies which they made themselves.
Many new, and much-improved, tools were available, such as tongs, pliers, cold
chisels, punches, awls, vices, and dies. Since the use of U.S. coins had been
declared illegal and the Mexicans had stopped exportation of pesos, most of
the smiths fashioned their silver ornaments from one-ounce squares of coin silver.
Silver jewelry had become a status symbol among the Navajos, the mark of wealth
and prestige. The "pawn system" allowed them to pawn their jewelry
to traders in exchange for food and other necessities. The jewelry was redeemed
when the owner had the money, usually from selling a rug or the wool from newly
sheared sheep. In the meantime, traders often allowed the owner to borrow the
jewelry for a ceremony or a fair, then return it the next day. Southwestern
tribes had used shell and turquoise beads in necklaces and earrings for centuries,
and the early Navajos wore these ornaments as well as turquoise nugget earrings.
The nugget necklaces so popular among the Navajos probably evolved through the
years. As turquoise became more available, it gradually replaced much of the
shell. Adding turquoise to silverwork was not a common practice until around
1900. Even then, one large stone was usually set into each classically simple
piece. Other stones, used to a lesser extent, included garnet, peridot, opal,
coral, smoky topaz, jasper, carnelian, chalcedony, agate, malachite, and jet,
to name a few. None ever enjoyed the popularity of turquoise. In the early 1900s,
the winds of change blew in with the coming of the railroad and the Fred Harvey
Company, which established accommodations along the route. Tourism was introduced
to Indian country, and tourists wanted silver jewelry. However, most of them
neither knew nor cared anything about quality; they wanted inexpensive pieces
adorned with garish designs, and shopkeepers were all too willing to please.
Items made strictly for tourists began appearing: ashtrays, watch bracelets,
letter openers, cigarette holders, and utensils.
Larger companies began mass-producing "Indian" jewelry; smaller shops
hired both non-Indians and Indians from various tribes to machine-stamp cheap,
tinny silver with designs such as lightning, clouds, arrows, Indian heads, snakes,
owls, swastikas, and thunderbirds, the last merely a figment of someone's imagination.
Lists of what these figures supposedly symbolized were given to tourists. At
that time, designs on authentic, handcrafted Indian jewelry were simply decorative.
To quote Carl Rosnek in Skystone and Silver: "A great deal of nonsense
was written or rumored concerning the 'meaning' of these symbols-when in fact,
with few exceptions, they had none for the Indians." Much of the tourist
jewelry was made of nickel and decorated with small imitation-turquoise stones.
Many of these items, sometimes referred to as "Route 66" jewelry because
of the proliferation of shops selling it along that highway, were stamped "nickel
silver." By 1937, laws were passed stating that only Indian-made jewelry
could be labeled as such, but circumvention became a favorite pastime. In 1940,
the Japanese even went so far as to name a town "Reservation," so
they could "legitimately" stamp Reservation Made onto manufactured
jewelry.
In an effort to slow down the mass production of cheap imitation Indian jewelry
made in sweatshops (as they were commonly called), the government ordered that
only handmade jewelry could be sold at National Parks and Monuments, and some
schools began teaching silversmithing. However, these were troubled times and,
with war looming on the horizon, the government had other concerns. In 1941
it did form the Navajo Arts and Crafts Guild to emphasize quality work and encourage
the casting of silver; consequently, the skills of many artists improved. The
project had to be dropped during World War II, but the Navajo Tribe was allowed
to take it over. Despite the problems facing the world and the degradation of
their craft during the early 1900s, there were many smiths who never lessened
their standards. Superb craftsmen continued to set high-grade stones in quality
silver, and some excellent jewelry of that period is considered classic. The
use of turquoise had increased through the years, and a few jewelers began adopting
the Zuni style of setting multiple stones close together in silver. A larger
piece of turquoise was surrounded by small stones, thus forming a cluster. This
"cluster style" was a change for Navajo silversmiths, but the Navajos
have always accepted change-when it benefited them. Experimenting with new techniques
and styles was a change they welcomed. Pgs. 9-28
The famous Navajo silverwork began in these hard years of reconstruction. It was a move made on the Indians' own initiative and, at first, without help from school or agent. For fifty years or so the Navajos had been wearing silver jewelry and bridle ornaments stolen or traded in Mexico. Why should they bother to make such things themselves? They were too busy with war and sheep raising. However, one medicine man called Etsidi Sani, or Old Smith, had at least been interested in ironwork. He had got a "Mexican" friend, which means New Mexican, to teach him how to make iron ornaments for bridles. Some have said he made silver as well as iron, but Old Smith's descendants are sure that the Navajos knew nothing about silverwork before going to Fort Sumner. At the fort, Old Smith had no chance to practice his art-unless, indeed, it was he who counterfeited those identification tags. "How could the Navajo work silver at Fort Sumner!" exclaimed their late chairman Chee Dodge. "They were locked up there just like sheep in a corral!" But when they returned to a poverty-stricken land, that was a different matter. Old Smith went back to his Mexican friend and, say his descendants, learned how to forge and hammer silver. He taught his four sons, using a forge made of baked mud, a bellows of goat skin, and tools out of any pieces of scrap iron begged or filched from the whites. Eagerly the Navajos seized this new means of trade and livelihood. The Zunis still tell how Ugly Smith, one of Old Smith's sons, came to their village in 1872. He came as a poor man, with nothing but his tools and the horse he rode. He stayed a year, teaching the Zunis to make bridle ornaments, belts, and bow guards. When he left, he was driving a herd of horses and sheep ahead of him. That was a bit later in Navajo history. Pgs. 157-158
Silversmithing
was learned even more recently. Woodward's data show that the Navahos started
to work silver at some time between 1853 and 1858. Techniques were probably
learned from whites, either directly from Mexicans or indirectly through other
Indian tribes. Much about metal-working may have been learned from the smiths
at Fort Sumner during the captivity in the sixties. Of design, Woodward says:
The ancestry of Navaho silver ornament forms has its roots in the silver trade
jewelry distributed to the tribes east of the Mississippi River after 1750,
and in the Mexican-Spanish costume ornaments and bridle trappings of the late
eighteenth and early nineteenth centuries.
The silver distributed to eastern Indians goes back to the traditions of the
great English smiths. Thus modern Navaho silver blends English and colonial
traditions with Spanish and (ultimately) Arabic. This explains why the solid,
simple pieces in the classical Navaho tradition often remind connoisseurs of
antique English silver. Pgs. 26-27
Navajo
silverwork has also been the subject of substantial scholarly research. Readers
interested in the various forms and stylistic changes of Navajo jewelry are
referred to the excellent studies by Margery Bedinger (1973), John Adair (1944),
and Arthur Woodward (1971). Our present study is concerned with the economic
implications of and technological changes in Navajo silversmithing. The Navajos
were wearing silver jewelry obtained from the Spaniards by the late eighteenth
century, and learned silversmithing from them in about the mid-nineteenth century.
Although many scholars have contended that the Navajos did not begin working
in silver until after Bosque Redondo it seems likely that they were learning
the rudiments of the trade in the previous decade. However, the evolution of
silversmithing as an economically important craft did not take place until after
1868. In 1869, Edward Palmer, who led several expeditions from the Peabody Museum
to the Southwest during the 1870s, wrote that the Navajos were making silver
buttons from Spanish and Mexican one real coins. According to Palmer, the buttons
were used as money. A one real coin was worth 12 1/2 or eight to the dollar,
and the buttons had the same value. Lack of proper tools limited the quality
and variety of items produced by early Navajo silversmiths. In 1871 the agency
requested and presumably issued a small number of anvils, vises, hammers, files,
file saws, and bellows to help Navajo blacksmiths, who usually worked as silversmiths
as well.
During the 1870s, the quality of Navajo silverwork improved as smiths acquired
a wider variety of tools from traders and learned to make tools themselves.
Matthews noted in the early 1880s that Navajo smiths purchased scissors, iron
pliers, hammers, awls, emery paper, fine files, and borax for soldering from
local traders. They had also learned to make goatskin bellows, anvils, dies
and bolts, sandstone molds for casting, tongs, and brass blowpipes.
As their equipment improved, the silversmiths could produce a greater variety
of items. By the early 1800s, they were making buttons, rosettes, bracelets,
bridle ornaments, and concha belts. Three or four of the smiths were fashioning
canteen-shaped tobacco cases. About 1880, some of the smiths in the Ganado area
started to make jewelry with turquoise sets. Silversmithing flourished during
the 1880s, when the Navajos prospered and began investing their wealth in silver
jewelry. In 1880, when Navajo employees of the agency were asking for their
pay in Mexican coins Manuelito decided to make bridles out of silver money.
Navajo silversmiths were finding a ready market for their work among their own
tribesmen, and a profitable trade in silver jewelry was evolving with local
whites and members of other tribes.
The development of the pawn system during the 1880s further encouraged silversmithing.
Silver ornaments, no matter what kind, could be pawned to traders in exchange
for other goods. The pawn system expanded the function of silver jewelry from
personal adornment to "savings" which could be used during times of
economic crisis. Bedinger thought that silversmithing probably started in the
Ganado area, and noted that most of the "pioneer" Navajo silversmiths
lived within twenty-five to forty miles of Ganado. The number of smiths rapidly
increased during this period, and by 1900 silversmiths lived throughout Navajo
country Nevertheless, in terms of technique, design, and skill, the Ganado smiths
continued to excel.
The masculine
counterpart of the squaw's art of rug weaving is silversmithing. In recent years,
however, the women have been taking up silversmithing, and it is estimated that
today there are nearly a hundred women silversmiths on the reservation. Since
there are no silver mines on the reservation, the Navajo had to obtain his metal
from outside. He used to melt down dollars, but he is now able to buy from the
traders squares of silver known locally as "slugs." The Navajo silversmith
is a true artist who will work incessantly for many hours and even without food
until he has finished his piece of jewelry. Though he borrowed the craft from
the Spaniards only about eighty years ago, he has developed it to a high degree
of perfection, despite a lack of proper tools. His rings, belt buckles, bracelets,
and necklaces, frequently set with native turquoise and adorned with die-work,
are worn by both Navajo men and women. They are also treasured by the white
people of our country and visitors from abroad. Navajo bracelets have no clasps.
Each bracelet has a small gap through which one's wrist slips. If the gap is
too big, the ends can be pressed together after the bracelet is on. An expert
can slip over his wrist a bracelet even with a very small gap by pressing one
end into the depression between the two forearm bones about two inches above
the wrist joint.
At one time, only the Navajo men wore silver earrings. The women had to be satisfied
with a loop of turquoise beads. The men's earrings were so tremendous that when
they rode a horse they had to tie them to the back of their necks to avoid excruciating
pain. Most of the silver ornaments sold in stores or to tourists are made by
Navajo men who practice their craft in the railroad towns or their vicinity.
The Navajo of the interior works with silver for his own pleasure. He does not
have the tools of his commercialized urban brother - the anvil, blow torch,
solder, compass, steel stamps, vise, nipper, pliers. For an anvil, he used a
hard stone or a piece of iron from a plow or wagon. Instead of a blow torch,
he has mud and sandstone forge with a hole in its bowl shaped bottom through
which air is pumped from a goatskin bellows to keep the fire smoldering. His
smelting fuel is charcoal made from juniper logs. His crucible in which he melts
his silver is made of poor clay that is porous and brittle. He greases his sandstone
molds before he pours his molten silver into them. To solder, he directs the
flame from a wick through a piece of tubing to the desired point on his fine
piece of silver. His solder consists of borax, saliva, and silverdust. When
he has finished his work of art, which by now is tarnished from flame and handling,
he dips it into a concoction of "rocksalt" in boiling water. He does
this before ornamenting it with turquoise, so that he will not damage the precious
stone.
Despite the simplicity and crudeness of his equipment, the Navajo silversmith
of the interior is able to produce round hollow silver beads and many other
ornaments of unsurpassed quality. His hollow beads are made by soldering together
two semispherical pieces of silver which have been hammered on hard wood marked
with indentations of various sizes and designs. The solid or raindrop bead is
made without the use of a mold. He blows air through a piece of tubing on a
bit of melted silver to give it the shape of a raindrop. A more recent method
is to take a small snip of silver and heat it over a small indentation in charred
wood, or on the so-called sandstone, which actually is pumaceous tuff. The snip
of silver turns into a small ball. By this technique dozens of balls may be
made at the same time. His engraving on a flat silver ornament is done with
the aid of sharply pointed knives, wires, and chisels. The commercial jewelry
has a lot of punched or stamped silver in it, but the Navajo prefers for himself
the simpler designs.
It is really astonishing what a stolid, uninspired-looking Navajo can do with
a few simple tools. My wife wanted a silver compact made for her like the one
she already had a machine-made object, the product of precision tools. To our
amazement though it took him a whole day because of the primitive nature of
his tools before our eyes he reproduced the whole thing in every detail, including
the old-style trunk hinges, by melting chunks of crude silver and pounding it
into the desired shapes. In addition he decorated it with Navajo designs and
turquoise. The compact is a piece of art far superior in value and beauty to
the original from which it was copied.
The white purchasers expect all sorts of symbolism in their designs, so the
Navajos give it to them. some Navajo designs are natural developments from pieces
of silver that have come into their possession. For example, tubular beads were
first made from silver buttons taken from Spanish soldiers whom they had killed
in battle. And the pronged pieces in the beautiful so-called squash blossom
necklace are the buttons which were sewed along the outside seams, from hip
to ankle, of Spanish army officers' pants. They really represent the pomegranate
blossom. The horseshoe-like piece hanging in the center of this necklace is
taken from a device meaning "Godspeed" that was used on old Spanish
bridles. It rested on the horse's forehead, ending in two palms turned inward.
The Navajo borrowed the design and replaced the hands with two turquoise stones.
The Navajo began combining turquoise with silver, it is said, some fifty years
ago. It is a poor Navajo who has no turquoise. Turquoise us found in Turquoise
Mountain in Arizona; Los Carrillos, New Mexico; Sand Bernardino County, California;
and Nye County, Nevada. It is also imported from Persia and Egypt. Turquoise
is a basic phosphate of copper and aluminum. The copper gives it its bluish
tone. The color of turquoise varies from greenish-gray, yellowish-green, apple-green,
and greenish-blue to sky-blue, the latter being the most valuable. Its color
fades in time and is destroyed by heat. Perspiration also affects it. A restoration
of its natural color can be effected by treating it with ammonium. Bone and
fossil turquoise, known as odontolite, is not true turquoise. It consists of
fossil bones or teeth, colored blue by vivionite, a hydrated iron phosphate.
Ammonia will not improve the color of odontolite. Pgs. 167-170