Snake Eyes

 

QUESTION: From my first visit to Arizona, I was taken by the beauty of the turquoise jewelry I found there. I’ve been back several times since and each time I discover new artisans. I especially like the style of the pieces created by members of the Zuni Tribe. I’d like to know more about this jewelry. How far back does this type of jewelry go? And how collectible is it today?

ANSWER: Much of the jewelry made by Southwestern Native Americans features one well-known semi-precious stone—turquoise. 

Formed from hydrated copper aluminum phosphate, turquoise has been mined beginning 3,000 years ago in Persia, now Iran. The Persians treasured this sky-blue stone because they believed it to have healing properties and the ability to protect or warn the wearer of evil.

Because of its scarcity, today’s Iranians no longer mine turquoise, making antique Persian turquoise jewelry, often carved and inlaid with gold, extremely valuable. Such pieces, like necklaces and amulets, first came to Europe through Turkey, where the stone got its current name, “turquoise.”

Turquoise has been found all over the world. The light and fragile material can range from opaque to semi-translucent, with a waxy to dull luster, and its colors, which vary based on their iron and copper content, span from China blue to deep blue, and from blue-green to yellowy green. In Tibet, green is the most valued color of turquoise.

The stone often contains  “inclusions” from the mother stone or “matrix” that held the turquoise as it formed, and this creates a “spiderweb” effect of brown, black, or ochre veins. Turquoise mined in the U.S. and Mexico tends to be greener  and often has more inclusions than the vein-free sky-blue version from Persia.

Turquoise may be used for beads, cabochons, or carved pieces like cameos in necklaces, earrings, bracelets, brooches, and belt buckles. The most valuable turquoise available today comes from the Sleeping Beauty mines in Arizona; it’s dark blue and matrix-free.

In the late 19th century, Navajo artisans began to incorporate turquoise mined locally into their silver jewelry, but it was quickly mined out. A trader named Lorenzo Hubble began to import cut turquoise from Persia for the Native Americans to use. Then, in the early 20th century a new mine for cut turquoise opened in Nevada. Soon other American mines followed. 

Various Native American tribes of the Southwestern U.S, including the Navajo, Hopi, and Zuni developed distinct styles of turquoise jewelry. 

For example, the Navajo created what’s known as the “squash blossom” necklace style, which features a crescent-shaped pendant covered with turquoise beads. While this style may have come from the pomegranate motif that Spanish conquistadors brought to Mexico, but there’s little evidence Native Americans intended this design to represent that flower. This style was also adopted by the Zuni.

Zuni jewelry is known for its rows of “snake eyes,” which are small, rounded, high-domed cabochons, often made of turquoise or coral. The Zunis are also known for their “petit point” jewelry, a style made of tiny hand-cut rounded, oval, or square turquoise clustered in unique designs, that originated in the 1920s. The Pueblo tribes, and particularly the San Domingo tribe, used turquoise in mosaic jewelry, as well as in their disk- or tube-shaped heishe beads. The Zuni were the first to introduce turquoise animal-shaped fetish beads.

In the 1970s, Native American jewelry became popular, so that United States mines became overwhelmed by the demand. Once again, Native American traders had to start importing Persian turquoise. 

Most turquoise jewelry on the market today, particularly if it’s affordable, is made of imitation turquoise, or low-grade turquoise treated to have a more attractive appearance. In fact, imitation turquoise goes back to the Victorians, who were the first to use glass to mimic the stone.

Most real American turquoise may turn green in response to light, oil, heat, and water, so it should be treated with care. Because it’s more porous than Persian turquoise, American turquoise, jewelry makers stabilize it by soaking it in resin or impregnating it with wax. This keeps it from crumbling and doesn’t affect the value. 

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It's a Small, Small World

QUESTION: I love old jewelry. Recently, I attended an antique show and one of the dealers had a case of old jewelry that got my attention. I was drawn to a beautiful old handpainted brooche. When I asked about it, the dealer said that it wasn’t painted at all but was made of hundreds of tiny glass pieces assembled in a mosaic scene. He said this method was called “micromosaic.” I wanted to buy the brooche on the spot, but it’s price was out of my range. Can you tell me what “micromosaic” is and a little about its history?

ANSWER: Sir Arthur Gilbert, a wealthy 20th-century collector, came up with the term “micromosaic” to describe Roman mosaics composed of little glass bricks called tesserae. Roman jewelers sold this type of miniature mosaic, made up of 1,500 to 5,000 pieces per square inch, to Victorian ladies on the Grand Tour in the early and mid-19th century.

While the most common forms were brooches and pendants, Roman jewelers also sold micromosaics in combinations called a parure, consisting of a matching necklace, earrings, brooch, bracelet and often a diadem or tiara. A variation on this is the demiparure which consists of as few as two matching pieces, such as earrings and a necklace or brooch. They also sold the pieces individually. Cemented to a glass, stone, or metal background and framed, the glass tesserae were originally so small that these pieces appeared to have been painted or enameled—that is until examined under a microscope.

The Victorians developed a passionate interest in the Classical Period of antiquities. They could purchase a brooche or other piece of jewelry containing an image of the Colosseum, the ancient ruins of Pompeii, or the beautiful scenery of the Italian countryside. To them, the jewelry acted as a wearable souvenir of their travels. Other popular motifs included miniature versions of ancient architectural mosaics, ancient wall paintings like those found at Herculean, King Charles spaniels, and mythological and religious figures.

Micro mosaic jewelry originated at the Vatican, which had its own secret formula for making glass-like enamel tesserae. During the mid-1770s, a few of the Vatican artists began making miniature mosaic art using tiny tessarae, creating the first micromosaics. They crafted miniature boxes, crosses, and jewelry to sell to visitors using typical Roman ruins and other familiar scenes of Italy.

The excavations at Pompeii, which had been completely covered by the volcanic eruption in A.D.79, uncovered a city that provided a glimpse of an ancient civilization almost beyond belief to the Victorian travelers. The mosaic columns, garden fountains and stone floors, some dating as early as the second century B.C.,were breathtakingly beautiful and found their way into the art of micromosaics.

Soon, commercial mosaic studios began opening in Rome, offering the rapidly growing tourist market micromosaic mementos of ancient Roman ruins. In the early days, the average European traveler could only afford micro mosaics set into pill boxes and paperweights, but wealthier travelers could afford elaborate pictures, tabletops, and jewelry.

Perhaps the most important designer of micromosiac jewelry was Castellani, an Italian workshop founded in 1814 and run by artisan Fortunato Pio Castellani and craftsman and Dante scholar Michelangelo Caetani. They took much of their inspiration from archaeological digs in ancient Rome and Egypt. Castellani’s artisans set their unusually fine micromosaic work  in gold frames, adorned with Etruscan filigree and granulation. Often, they would incorporate Latin sayings in their mosaic designs, using Roman capitals surrounded by geometric designs.

The work of the Castellani family greatly influenced another famous Italian jeweler, Carlo Guiuliano. During the 1860s, he set up shop in London. His work concentrated more on the reproduction of Italian Renaissance jewelry than Roman and Etruscan designs, fashioning his pieces to Victorian taste. After his death, his two sons, Frederico and Ferdinando, continued the business until it closed in 1914. A signed Guiuliano gold necklace, matching brooch and earrings, with Roman mosaic of putti, muses and flowers, is worth about $5,000 to $6,000 in today's market.

Crafstmen made their micromosaic jewelry similar to larger pieces. They glued small sections of fine rods of colored glass into patterns or pictures within a frame of hardstone or colored glass. They then set the whole piece in an outer gold or silver frame that gave added protection to the fragile center.

Besides ancient ruins, subjects included flowers, such as delicately shaded roses, lilies, violets and carnations which were symbols of love and friendship in Victorian times. Birds and insects were also popular. Many micromosaics portray the dove—a common symbol of purity and peace.

As the 19th century came to an end and more and more middle class tourists visited Italy, jewelers began to cut corners with their micromosaic pieces. They began using larger pieces of glass and shoddy workmanship in order to keep up with the demand for less expensive pieces. Many of the pieces available today come from the 1890s to the 1920s.

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