A Matura diamond is actually a variety of this mineral that's used as a diamond substitute
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Zircon: The gemstone Zircon information and pictures - The Mineral ...  In fact, many of the gem forms of zircon (even those that are not radioactive) are heat treated to enhance ... It is often used as a cheaper, yet natural alternative to Diamond. ... VARIETIES ... Matura Diamond - Trade name for colorless Zircon.
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7 Classy Alternatives to Expensive Diamond Engagement Rings ...  Nov 6, 2015 ... These 7 classy alternativesincluding moissanite, sapphires, and ... It's no coincidence that this same season is the biggest for diamond ring...
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Zircon Gemstone & Jewelry Information; Natural Zircon: GemSelect  Jan 25, 2007 ... Many people confuse zircon with the artificial diamond simulant, cubic zirconia. ... white zircon was actually one of the most popular diamond substitutes, owing ... often marketed under the misleading trade name of 'Matura diamond'. ... It is the oldest mineral on Earth, with samples found in Australia that are...
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25 Types of Clear Gemstones in Jewelry | Kamayo Jewelry  Aug 25, 2014 ... Do you know the different clear crystals used in jewelry? ... If you're looking for white stones that are actually opaque, please see ... Diamond is the most expensive of clear gemstones, with prices of up to ... The second hardest gemstone next to diamond, sapphire is the gemstone of the mineral corundum,...
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Diamond Substitute Gemstones and Minerals | Gem5.com  The following is a list of Diamond Substitute gems and minerals listed in our ... It is the presence of impurities that gives other varieties of quartz their colors. ... is usually used to describe an optical effect and unlike most variety names it is not...
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Free Flashcards about GEOLOGY/EARTH SCI. - StudyStack  A DIAMOND CAN ONLY BE SCRATCHED BY THIS TYPE OF STONE ... THE ZIRCON IS SECOND ONLY TO THIS GEM IN ABILITY TO DISPERSE LIGHT...
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The 4 C's Of Diamonds - Encyclopedia - The Free Dictionary  the hardest natural substance known, used as a gem and in industry. ... In 1867, a stone found in South Africa was recognized as a diamond. Within a ... with, the De Beersled marketing cartel, formed to maintain the price of diamonds at a high level. ... Three crystalline modifications of carbon are known: the cubic variety,...
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Gemstones: Facts, photos, information for 100+ gems - Geology.com  Detailed information and photos for over 100 gemstone varieties from ... Ruby and Sapphire Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United ... Green Gemstones Green Gemstones - emerald, peridot, jade, tsavorite, ... Malachite Malachite has served as a gem material, pigment and ore of...
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Black Gemstones and Minerals | Gem5.com  ... material composed of lignite, and is a bituminous coal which can be polished. ... Its color is shiny black, with clear conchoidal (shell-like)fracture, its texture ... minerals in which magnesium may be replaced with iron, zinc, and above all, .... Thus diamond is much harder and has a higher specific gravity (3.52) than graphite...
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Diamond - Wikipedia  Diamond is a metastable allotrope of carbon, where the carbon atoms are arranged in a .... Diamond-bearing rock is carried from the mantle to the Earth's surface by ... Not all pipes contain diamonds, and even fewer contain enough diamonds to ... These minerals are rich in chromium (Cr) or titanium (Ti), elements which...
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Birthstones | Anstett Jewellers  The versatile garnet comes in a virtual rainbow of colours, from the deep red ... and Sri Lanka and the subtle pinks and purples of the rhododendron flower, are also ... Aquamarines are found in a range of blue shades, from the palest pastel to ... Black diamonds, for example, are usually enhanced in this way. ... July  Ruby.
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Full text of "Diamonds in Arkansas: A Brief Account of the Discovery ...  Mines, Ltd., Kimberley, South Africa, ON Property of the Arkansas Diamond Company. ... as peridotite, a rock of a bluish green color, land known in Africa as Kimberlite, ... The harder varieties of the peridotite, which may -and do occur in the same ..... As to what the yield in carats per load (sixteen cubic feet) of this Arkansas...
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Diamond Guide | Diamond Glossary | Created Diamonds ...  The most common style of cutting for both diamonds and colored stones. The standard round brilliant consists of a total of 58 facets: 1 table, 8 bezel facets, 8 star ..... Laser drilling uses a laser to drill down to a dark inclusion in a diamond.
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What's the birthstone for August? | Earth | EarthSky  Aug 3, 2015 ... Peridot is a gem-quality transparent variety of olivine, a mineral composed of magnesium-iron silicates. The color of olivine ranges from olive to...
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A Guide to Gem Classification - International Gem Society  Precious and Semiprecious Gems; Diamonds and Colored Stones; Natural, Synthetic, and Imitation Gems; Organic and Inorganic Gems; Crystalline and .... Diamond and graphite both have the same chemical makeup: pure carbon. So, what...
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Diamond (gemstone) - Wikipedia  A diamond is one of the best-known and most sought-after gemstones. Diamonds have been ... The first diamond there was found in 1866 on the banks of the Orange River and became known as the Eureka Diamond. ... Some 85% of the world's rough diamonds, 50% of cut diamonds, and 40% of ..... Retrieved 2008-10-21.
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The Minerals of New York City, a review of the history of mining and ...  The earliest mention of titanite crystals from NYC was in the Inwood marble ... 1 illustrates gemstones of heliodor and aquamarine varieties of beryl, .... But this is an example of an underlying principle to mineral collecting: even ... Laumontite, 10 mm, Harold Avenue (An Obsolete Street Name) In Long Island City, Queens.
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September birthstone: Blue Sapphire. September Birthstone Color is ...  The deep blue of a sapphire is one of the most beloved and intriguing colors known to ... One extremely rare color type, the orange-pink corundum, is known as the ... The most famous sapphire, the 563-carat Star of India, was mined in India and is ... birthstone jewelry, especially for children, are often lab-createdfor larger...
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Jade - Wikipedia  Jade is an ornamental rock. The term jade is applied to two different metamorphic rocks that are composed of different silicate minerals: Nephrite consists of a microcrystalline interlocking fibrous matrix of the ... and aluminium-rich pyroxene. The gem form of the mineral is a microcrystalline interlocking crystal matrix.
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Beryl - Wikipedia  Beryl is a mineral composed of beryllium aluminium cyclosilicate with the chemical formula Be3Al2(Si O3)6. Well known varieties of beryl include emerald and aquamarine. .... Emerald is a rare and valuable gemstone and, as such, it has provided the incentive for developing synthetic emeralds. Both hydrothermal and...
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Ruby and Sapphire: Gems of the Mineral Corundum - Geology.com  Synthetic corundums offer consumers stones of great color and clarity at affordable prices. ... Ruby and sapphire have the same chemical composition and crystal structure .... Most gem-grade corundum forms in metamorphic rocks such as schist or ... highly sought after in many parts of the world for over one thousand years.