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All weights pertaining to gemstones, including diamonds, are minimum weights. Additionally, please note that many gemstones are treated to enhance their beauty. View Gemstone Enhancements and Special Care Requirements for important information.
By far the most common color of gold used in jewelry, yellow gold is gold in its natural shade. Yellow gold is usually alloyed with copper and silver to increase the strength of the metal. How yellow the metal is depends upon the content of gold. A 14-karat piece of jewelry will have a brighter yellow hue than a 10-karat piece. Likewise, an 18-karat piece of jewelry will have a deeper yellow than 14-karat gold, and so on.
Gold's softness and malleability make it a wonderful metal to work with when creating virtually any design in jewelry. But this softness can be a drawback as well. To make it stronger and more durable, gold is usually alloyed, or mixed, with other metals such as copper or silver. The higher a metal's percentage of gold content, the softer and more yellow the jewelry piece. The karat weight system used to measure gold in a piece is the same for all hues, including white and yellow gold.
The word “carat” is Arabic, meaning “bean seed.” This is because historically seeds were used to measure weights of gold and precious stones. In the United States, “karat” with a “k” is used to measure gold's purity, while “carat” with a “c” is used in measuring a gemstone's size. The karat mark of gold represents the percentage of pure gold to alloy.
In order to determine the karat weight of a specific item, simply look for the quality mark. Jewelry items will bear the stamp of their karatage based upon the United States or European system of marking. The United States system designates pieces by their karats—24K, 18K, 14K, 10K, etc. The European system designates pieces by their percentage of gold content. For instance, 10K gold is marked “417,” denoting 41.7% gold; 14K is marked “585,” denoting 58.5% gold; and 18K is marked “750,” denoting 75% gold; etc.
Peridot features a lively yellow-green color that is transparent with an oily luster. The iron that creates peridot’s color is an integral part of its structure, so the gem is only found in various shades of green. It is most prized in lime hues, but Italian peridot is a rich olive color and popular American peridot is a beautiful light yellow-green. The Romans called peridot “evening emerald” because its exquisite green color was said to glow at night. This is perhaps because the stone exhibits double refraction, meaning that when looking through the stone, objects appear double. So when looking into a faceted peridot, the number of bottom facets appears to be double the actual number, creating a glittering sensation.
Pronounced PEAR-A-DOE, the word “peridot” comes from the French word meaning “gem.” It is the gem variety of the mineral olivine and ranks a 6.5-7.0 on the Mohs Scale.
Born in cauldrons of fire, peridot is considered the “volcanic gem,” since small crystals of it are often found in the rocks created by volcanoes. In fact, Hawaiian legend called peridot the divine tears wept by Pele, goddess of the volcano. The island of Oahu even has beaches made out of olivine grains, but they are much too small to cut into peridot. Samples of the gem also have been discovered in meteorites that have fallen to Earth, many of which are more than a billion years old.
Peridot traces its jewelry roots to 3,500 years ago. The stone was first mined by the ancient Egyptians on the volcanic island of Zebargad in the Red Sea. Known as the “serpent isle,” it was infested with poisonous snakes that interfered with mining activity until one Pharaoh had them all driven into the sea. Today, Native Americans mine most peridot on the San Carlos Reservation in Arizona. Interestingly, a lmost all peridot sold in Hawaii is from Arizona, despite the fact that peridot is produced by Hawaii's volcanoes. The gemstone is also found in Norway, Brazil, China, Egypt, Italy, Myanmar and Sri Lanka. An exciting new deposit was discovered in Pakistan in 1994, yielding some of the finest peridot ever seen, including one stone that weighed more than 300.00ct.
Peridot is among the oldest known stones and has been mined as a gem for thousands of years. As early as 1575 to 1350 B.C., the ancient Egyptians used peridot beads in their ceremonial jewelry. In fact, it is believed the stone was one of the favorite gems of Cleopatra and that some of the “emeralds” she wore were actually peridot.
Ancient Egyptians also carved small drinking vessels out of large chunks of peridot. Priests would drink soma from them in rituals, believing the soma would put them in touch with the nature goddess, Isis. Legend has it that King Soloman traded cedar trees from Lebanon for 12 soma drinking cups and 144 liters of soma. The Egyptians made this trade for ramp logs to build their pyramids at Gisa, while King Soloman was said to have been enlightened by drinking soma from the peridot cups. Today, Mexican hill tribes still drink soma from green glazed cups to put them in touch with nature and their ancestors’ spirits. Additionally, some Native American Indians in Arizona use tea made from peyote ground with peridot crystals in their rituals.
Peridot has also been important to other cultures throughout history. Late in the Ottoman Empire (1300 to 1900), peridot was a highly prized gem and Turkish Sultans amassed some of the world’s largest collections of the gemstone. It is mentioned in the Bible under the name of “chrysolite,” and was used to decorate medieval churches with samples that were most likely carried back to Europe by the Crusaders. Large stones weighing more than 200.00ct adorn the Shrine of the Three Magi at the Cologne Cathedral in Germany.
Throughout the ages, peridot has been believed to hold mystical powers of protection and healing. The ancients regarded the stone as a symbol of the sun and wore it in amulets to prevent nightmares and drive away evil spirits. It was even favored by pirates to protect them against evil. Peridot was said to be useful for calming raging angers, curing nervous afflictions and promoting quiet sleep. It was also believed to strengthen any medicine drunk from goblets carved from the stone. South American Shamans used peridot to ward off snakebites and the evil spirits who have taken the form of mosquitoes who bring the sleeping sickness. They also say the heating of magic mushroom tea by peridot takes them on trips to the ancestor heavens.
Today, peridot is believed to bring the wearer success, peace and good luck. To be most powerful, it is said that the stone should be mounted in gold and surrounded with small diamonds. With powers that are thought to bring protection and health, modern folklore also says it can be used to attract love and calm anger while soothing nerves and dispelling negative emotions. T he gem is believed to protect the wearer from bad dreams when set in gold.
Peridot is considered the birthstone of August. Given as a symbol of fame, dignity and protection, this gem is also traditionally given to couples celebrating their 16 th wedding anniversaries.
Pronounced SAV-OH-RITE, the tsavorite gemstone features an intense green color that ranges from a vivid light hue to a deep, velvety forest shade. It is a member of the garnet family and is often referred to as a green grossularite. Like other garnets, tsavorite is naturally pristine with no treatments and features a strikingly high brilliance.
In 1967, British geologist Campbell R. Brides discovered tsavorite in Tanzania. He found strange, potato-shaped rocks that had breathtakingly beautiful green grains and crystals inside them. In 1971, he discovered the same gemstone vein extended into Kenya, where he could officially start exploiting the occurrence.
Henry Platt, the former president of Tiffany & Co in New York, named the stone after its occurrence near the famous game frontier, Tsavo-National Park. In 1974, Tiffany’s started a special promotion campaign to make tsavorite well known throughout the United States. Campaigns in other countries followed, and tsavorite soon became sought-after everywhere.
Tsavorite is quite rare and can cost several thousand dollars per carat depending on size and quality. Larger stones are exceedingly scarce . Only occasionally is a rough crystal more than 5.00ct found, making tsavorites weighing 2.00ct or more quite valuable. Fortunately, the brilliance and luminosity of these gems are displayed even in smaller sizes. They rank a hardness of 7.5 on the Mohs Scale and enjoy an especially high light-refraction index.
Too new to have folklore of its own, tsavorite is believed to hold the mystical powers of garnet, including protection and healing. Garnets also symbolize loyalty and can be exchanged between friends to ensure they meet again.