Gem Insider® Sterling Silver 9x7mm Oval Kingman Turquoise & Spinel Ring
Black spinel adds dark edge to a trio of turquoise orbs in this beaming design. Crafted from polished rhodium plated sterling silver with black rhodium accents, this ring features one oval shaped 9 x 7mm and two oval shaped 7 x 5mm impregnated turquoise cabochons in adhesive settings. Set between the turquoise cabochons are 20 round cut 1.3mm black spinels in prong settings.
You'll also find two round cut 2.5mm black spinels in bezel settings. The total turquoise weight is 1.48ct and the total black spinel weight is 1.66ct (both approximate). Measures 3/8"L x 13/16"W x 5/16"H.
Part of the Gem Insider® Collection. Made in China. All weights pertaining to diamond weights are minimum weights. Additionally, please note that many gemstones are treated to enhance their beauty. Click here for important information about gemstone enhancements and special care requirements.
Sterling silver, also called fine silver, is a beautifully lustrous cool-toned precious metal favored in fine jewelry among other products. The most reflective of all metals (excluding mercury), sterling silver looks stunning by itself and brings out the best hues in an array of colorful gemstones.
Sterling silver can be polished to a higher sheen than platinum. In fact, Ag, the chemical symbol for silver, comes from a word that means “white and shining.” The surface of silver can boast that shiny, polished appearance, or can be brushed, satin, matte, sandblasted, antiqued or oxidized (chemically blackened).
In order to be called sterling silver, a metal must be made up of a minimum of 92.5% pure silver and 7.5% alloy (meaning other metals), including but not limited to copper and nickel. The alloy is added to pure silver to make the metal more durable, tougher and harder. Sterling silver is designated a fineness of “925.” Pieces with sterling silver may be marked “sterling.”
Finishes on Sterling Silver
Finishing, or plating, is a common treatment with sterling silver. Popular types of plating are rhodium plating, gold plating and anti-tarnish plating. Plating is used to extend the life and sheen of the jewelry. After sizing or buffing a piece of jewelry with a machine, it must be re-plated to restore the finish.
Caring for Sterling Silver
Sterling silver becomes tarnished as the result of a natural chemical process that occurs when sterling silver is exposed to chemicals in the air, rubber, wool and latex. Humidity also plays a role in accelerating tarnishing. It's easy to keep your sterling silver sparkling, though, by taking a few steps to prevent tarnish and other wear and tear.
One of the oldest known gems, turquoise has been prized for thousands of years. The Egyptians believed it had powerful mystical properties, and turquoise jewelry has been found interred with 7,500-year-old mummies. Ancient manuscripts from Persia, India, Afghanistan and Arabia say that the health of a person wearing turquoise could be assessed by variations in the color of the stone. Montezuma's treasure, now displayed in the British Museum, includes a carved serpent covered by a mosaic of turquoise.
Turquoise was especially revered by the Native American culture, an association that dates back to the Aztec empire more than 700 years ago. For the Aztecs, turquoise was reserved for the gods and mere mortals were forbidden to wear it. They believed it to be a gem of good fortune and a commodity more valuable than gold. Native Americans believed turquoise protected people from demons and they even placed turquoise in tombs to guard the dead. The stone's colors were thought to be symbolically blue for the heavens and green for the earth. Often warriors tied turquoise to their bows to ensure accurate shots.
Today, turquoise is still believed to provide protection and bring luck. It is said to also promote prosperity, love, healing, courage and friendship. The stone is thought to relax the mind and ease mental tension.
The gem's opaque turquoise color varies from shades of greenish blue to deep cobalt to sky blue. Some varieties display white or brown matrixes, which are streaks of the mother stone from which they came, while others have veins of black matrix running through them. Generally, the bluer the blue, the more highly valued the stone. A clear, even texture without mottling or veins is also preferred. The most rare and valuable color is an intense azure, but the most common is the mild to medium sky blue. Sometimes imitated by minerals such as chrysocolla, turquoise stones are often dyed or colored with coatings of various resins.
In the 13th century, turquoise was mistakenly believed to have come from the country of Turkey. Hence, its name came from the French word for Turkey, "Turquie". The stone was actually brought to Europe from Persia (now Iran), via Turkey. It is a mineral usually found in association with copper deposits and is sometimes mined as a by-product of copper mining.
Although turquoise is found in desert regions worldwide, especially in the southwestern United States, perhaps the finest and most valuable comes from the Sleeping Beauty mine in Globe, Arizona. It is named after the Sleeping Beauty Mountain which resembles a reclined woman in a slumbering state. Its turquoise is world renowned for its beauty that ranges from pure robin's egg blue to a darker royal blue.
While only ranking between 5.0 and 6.0 on the Mohs Scale of hardness, turquoise remains quite popular for jewelry. In Europe, turquoise rings are given as forget-me-not gifts, while in the United States, the stone is given as traditional 5th and 11th wedding anniversary gifts. It has even become a modern consideration for the December birthstone. When wearing turquoise over the years, the stone will absorb oil from a person's skin, causing a slight change to the color of turquoise.
Turquoise is commonly treated in various fashions to ensure its durability and visual appeal, especially when set in jewelry. If a stone has been treated, the type of process will be noted.
Turquoise is one of the oldest gemstones known in history going back 6,000 years BC and has been revered by almost every ancient culture. It is the alternate birthstone for December and has a Mohs rating of 5.0-6.0. Turquoise is a Hydrous Phosphate of Aluminum and Copper and may form as a chalky coating on rocks or finely disseminated crystals formed within small rock cavities. Rough such as this is not commercially viable, which has led to the development of reconstituted turquoise. Turquoise-bearing rock is pulverized and the turquoise is separated from the rock using a float process. The pulverized turquoise is then mixed with a colored resin, which is then injected into a mold to form a solid block. This is then cubed, preformed and fashioned into various shapes and sizes. It is an excellent method of using rough that would otherwise not be usable.
The great imposter of gemstone history, many famous rubies have been found to actually be spinels. Perhaps the most famous of which is the Black Prince’s Ruby. Once worn by Henry V on his battle helmet, this 170.00ct red spinel is now set in the British Imperial State Crown. Another famous misidentification is the Timur Ruby, a 352.00ct red spinel now owned by Queen Elizabeth. This particular stone is engraved with the names of the Mughal emperors who previously owned it.
History is unclear whether these mistaken identities were merely accidents or clever substitutions of rubies for the less valuable spinels by dishonest jewelers. In Burma, spinel was recognized as a separate gem species in 1587, but the masquerade lasted for hundreds of years after that in most other countries.
Spinel carries a considerable amount of worth not only based on its history, but due to its brilliance and wide range of spectacular colors. When interpreted by the Greek, the word “spinel” means “spark” in reference to its beautiful sparkle. While a rich red is the most common color, spinel can be found in shades of pink, purple, green, brown or black. An exceptional color from Burma is a vivid hot pink with an orange undertone. Spinel can also come in a beautiful blue hue, sometimes called cobalt spinel, but this color is quite rare.
The main obstacle holding back greater recognition for spinel is rarity. Fine spinels are now more rare than the rubies they used to imitate. Strangely, however, they are also more affordable, since too rare can be a drawback because such few people have the opportunity to grow to love them. The most beautiful colors of the stone are mined in Myanmar (formerly Burma), but spinels are also found in Sri Lanka, Tanzania and Russia. They have a hardness of 7.5-8.0 on the Mohs Scale and are traditionally given as a 22nd wedding anniversary gift.