About Gemstones
About Gemstones
January |
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Garnet |
Truly ancient, the garnet has been the gem of faith and truth for centuries, bestowing upon the wearer the quality of constancy and the ability to make deep and lasting friendships. Like other red stones, garnet was considered a remedy for hemorrhage and inflammatory disease and a general protection from wounds.
Commonly thought of as a dark red stone, it is actually a large family of gems occurring in every color but blue. Brilliant, colorful and durable, garnets have been found on every continent, but most are mined in Southeast Asia, Brazil and Africa.
Garnets usually dark brownish to purplish red usually cut in small sizes (under 2 carats), as larger stones appear black. Garnet ranges in color from colorless to black though it is often thought of as only red. There are various types of garnet with the hardness ranging from 7 - 7.5. |
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February |
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Amethyst |
Believed by the ancient Greeks to have been stained with the wine of Bacchus, this stone was thought to be an amulet against intoxication and so named "amethustos" or "not drunken". It can also calm anger, quicken the wit and make one shrewd in business matters.
Amethyst has been prized ever since, particularly by nobility, for its rich purple hues. It may be found in colors ranging from the palest lavenders to the deepest purple. Generally, the deeper the color the more highly prized the stone. A member of the quartz family, amethyst is mined extensively in Brazil and Zambia.
Amethyst is purple quartz and is one of the most popular gemstones. It varies from pale lavender to deep purple with red highlights. Amethyst is generally abundant and quite inexpensive. Amethyst is purple, lilac or mauve. The highest quality is transparent. It has a hardness of 7. |
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March |
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Aquamarine or Bloodstone |
Derived from the Latin, no gem has a more descriptive name than the aquamarine. The name aquamarine literally means "seawater", a tribute to its beautiful blue color. Long associated with tranquility and happiness, aquamarine was also thought to instill courage, cure laziness and sharpen the intellect.
Like emerald, aquamarine is a member of the beryl family. It is frequently free of flaws and may occur in very large crystals. The aquamarine is not a brilliant stone, but depends on its size and purity of color for effect. Brazil is the most prolific supplier of aquamarine, which is often found in shades of blue-green, light and dark blue. The highest quality is transparent. It has a hardness of 7.5. Aquamarine often becomes paler if left out in the sun.
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April |
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Diamond |
The diamond has been a symbol of eternal love since the 15th century, when Archduke Maximillian of Austria sealed his engagement to Mary of Burgundy with a diamond ring. Of all jewels, the diamond is supreme and worthy of the name precious stone. It qualifies for all the virtues implied in that term: brilliance, hardness, rarity, antiquity, purity and permanence.
Although the most desirable diamond is colorless, distinct body colors such as blue, green, red, pink, and yellow are known. These natural fancy colors are rare and highly prized.
While India was the world's main source of diamonds for over 2,000 years, most diamonds now come from Africa, Russia and Australia. Of all diamonds mined, only a quarter are of gem quality.
Diamonds are slightly yellowish, and in this general color range, those most approaching absolute lack of color are most prized. However, brightly colored diamonds are much rarer and more expensive. The deep blue Hope diamond and blue Eugenie diamond, both in the Smithsonian collection, are among the most famous examples. It has a hardness of 10. |
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May |
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Emerald |
One of the most valuable gems, emerald has been coveted through history. It was attributed such great power that it was often used in powdered form to prevent epilepsy, stop bleeding, cure dysentery and fever, and avert panic. In addition, emerald was thought to make its owner eloquent and persuasive, bring joy, give the ability to foretell the future and improve memory.
The choicest member of the beryl family, the ideal shade for emerald is an intense green, distinct from any other green gemstone. Larger size stones tend to contain slight faults or flaws. Accordingly, good sized perfect stones are extremely rare, which accounts for their costliness. Colombia and Africa are the major sources for emerald.
Emeralds are medium to dark green beryl which derives its color from chromium and vanadium. Emerald has a hardness rating of 7.5. The best known sources include Colombia, Zambia. Almost all emeralds contain numerous small inclusions and fractures that promote fragility. Most stones on the market are impregnated with oils, waxes, or other substances to mask the fractures and sometimes enhance color. |
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June |
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Pearl or Alexandrite |
Since the Hindu god Vishnu searched the seas for a pearl to adorn his daughter on her wedding day, pearls have been the symbols of love, happiness, wealth, honor and longevity.
Both natural and cultured pearls form when a piece of sand, shell or other irritant causes the oyster to coat the foreign body with the pearly substance known as nacre. The value of a pearl is determined by several factors: the perfection of its shape, size, color and freedom from blemishes.
Today, Japan is a major source for cultured pearls.
Pearls are formed in shellfish, as a reactant to an irritant such as a piece of sand. Cultured pearls are created by adding a piece of mussel or shell inside of an oyster of mussel. This then creates a pearl as layers of the inside of the shell grow over the added substance. The price of pearls vary widely as a result of luster, size, how they were grown, color and type. Natural pearls are the most expensive, followed by cultured pearls. Fresh water pearls tend to be relatively inexpensive. Pearls are generally white, brown, silver, cream, black or pink depending on the type of shellfish and water. Pearl has a hardness of 3.
Alexandrite changes from green to red, mauve or brown in incandescent light. Alexandrite has a hardness rating of 8.5. There are many many synthetic alexandrites on the market. Natural alexandrite is very rare. Alexandrite is found in Brazil, Madagascar, Myanmar, Russia, Sri Lanka and Zimbabwe. |
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July |
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Ruby |
Many times rarer than diamonds, rubies have been passionately admired throughout the world, throughout history. The powers that have been ascribed to ruby over the centuries are innumerable. Even the Bible compares the price of wisdom to the price or rubies. Rubies were also said to protect their owners from misfortune and to reconcile disputes.
A member of the corundum family, as is sapphire, the hardness of a ruby is only surpassed by that of a diamond. While the color can range from a pink-red to a purple-red, the most dramatic stones are a bright, intense red.
The world's finest deep red (pigeon blood) rubies come from Burma. Today, the world's major sources of rubies are in Thailand. Thai rubies are mostly dark and brownish-red.
Ruby may be any color of red depending on the chromium and iron content of the stone. Ruby has a hardness rating of 9. Generally, ruby is quite durable. Still, rubies are subject to chipping and fracture if handled roughly. Ruby is found worldwide. The finest stones are from Myanmar. Bright red stones are mined in: Afganistan, Pakistan, Vietnam. Brownish-red rubies are from Thailand. Darker stones are generally produced from the mines in Australia, India, Russia and USA (Georgia, North Carolina and Wyoming). |
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August |
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Peridot |
Although its name is simply a French word derived from the Arabic for green, peridot has always been surrounded by complex superstitions. It was believed to inhibit enchantments, to protect its wearer from evil spirits and to glow in the dark.
Its color ranges from a springtime yellow-green to a warm olive green. Peridot is also distinguished by its soft, velvety appearance. Color is the most important quality for peridots. Hence, the greener the peridot, the higher its value.
Mined on the island of Zebirget in the Red Sea since ancient times, peridot also comes from Burma, although most is found in Arizona and the southwestern United States.
Peridot is a transparent lime or olive green. It has a hardness of 6.5. As with all gems, protect peridot from scratches and sharp blows. Also avoid large temperature changes (such as leaving it by a heater vent or in a hot car). Do not clean peridot in a home ultrasonic cleaner. |
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September |
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Sapphire |
Ancient Persians believed the earth rested on a giant sapphire whose reflection gave the sky its color. Considered pure and sacred and to confer peace and wisdom on its owner, sapphire is said to refuse to shine if worn by the wicked. Contemplation of a sapphire was also said to cleanse the soul.
Sapphire is a member of the corundum family. And while red corundum is known as ruby, all other colors are known as sapphire.
Most sapphires are mined in Sri Lanka, Thailand, Burma and Australia.
All gem quality corundum that is not red is called sapphire such as blue, orange, yellow, violet, green, white and pink. Unless a color is stated, sapphire is assumed to be blue. Some sapphires (color change sapphires) will change between blue and violet depending on the light. Sapphire has a hardness of 9. Generally, sapphire is quite durable. Still, sapphires are subject to chipping and fracture if handled roughly. |
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October |
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Opal or Tourmaline |
It has been written that opal possesses the virtues of all stones as it displays their many colors. Opal is a mysterious gem, thought to be a symbol of hope and jinx. The Arabs believed opal to be a gift from heaven that would fall in the flashes of lightening.
The characteristic feature of the gem opal is play of colors; pure colors can be seen in rapid succession as the gem is moved about. Derived from the Sanskrit "upala" and the Latin "opalus", meaning "precious stone", no two stones are ever alike. Found primarily in Australia as well as Mexico, opals are delicate by nature.
Opal in large sizes are rare and costly, especially black opal. Usually cut as cabochons, sometimes beads. Occasionally found as fossilized (opalized) clamshells, snail shells, or wood. Transparent opals, such as Mexican red or orange fire opal, are often faceted. Values are normally determined by the presence and nature of color flashes (play of color). Opal's scratch hardness is measured at 6.0 to 6.5 on the Mohs' scale, similar in hardness to quartz, a little more than halfway between the hardness of talc and diamond.
Tourmaline comes in many colors such as blue, yellow, pink, red, black, green and clear. It has a hardness of 7.5. As with all gems, protect tourmaline from scratches and sharp blows |
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November |
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Topaz |
Topaz is revered for its color, clarity and hardness. During the Middle Ages topaz was thought drive away sadness, bring wisdom, bestow courage, and even cure insomnia.
A common misconception is that all topaz is yellow. Once the name given to all yellow gems, true golden topaz is labeled "Imperial". "Precious" topaz may be yellow, golden-brown, blue, green, pink or sherry colored. Brazil is the most important source of this stone.
Citrine is yellow to brown quartz. It varies from pale yellow to rich golden yellow to dark orange. Although citrine may occur naturally, much is produced by heating amethyst under controlled conditions. |
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December |
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Turquoise, Tanzanite or Zircon |
From Egypt and Persia (Iran) to Tibet and the Americas, turquoise has been treasured for its beauty since prehistoric times. Hindus and Persians believed that one who observed the reflection of the moon on a turquoise was assured good luck, protection from evil and great wealth.
Color is the superlative gem property of turquoise. Turquoise can be green yellow-green, blue-green, pale blue or dark blue. It may or may not include a "matrix" of rock which can form intricate lace-like patterns throughout the stone, adding character, but detracting from value. Found in the southwestern United States and Mexico, the richest blue specimens are from Iran.
Topaz comes in many colors such as blue, yellow, pink, brown, green and clear. Orange-red "Imperial" topaz is rare. Topaz has a hardness of 8. As with all gems, protect topaz from scratches and sharp blows.
Zircon is a natural stone - not to be confused with Cubic Zirconia which is manmade. It is known as a colorless stone used to imitate diamonds but also comes in: blue, yellow, orange, red, brown and green . It has a hardness of 7.5. Zircon is somewhat soft so avoid scratches and sharp blows. Avoid hot water and household chemicals. |
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