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Date : 2008-07-28
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Minerals and Gems National Geographic ~ Gemstones Diamonds made of carbon atoms are the hardest natural substance found on Earth Rubies are formed of a mineral called corundum comprised of aluminum oxide Emeralds are formed of a mineral called beryl whose chemical formula is a complex mix of beryllium aluminum
Gemstones Facts photos and information for over 100 gems ~ Gem Mineral Collections are a great way to learn about gem materials Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States Tumbled Stones are rocks that have been rounded smoothed and polished in a rock tumbler
The Mineral and Gemstone Kingdom Home ~ The Mineral and Gemstone Kingdom is a free informational and educational guide to rocks minerals gemstones and jewelry This site has been providing detailed information and photos of hundreds of mineral and gemstone since 1997 and is one of the leading education resources on minerals and gemstones
Minerals Rocks and Gems ~ Gemstones have their own science as well called gemology which is a branch of mineralogy But the concept of a gemstone is based on human value judgements A gemstone is usually defined as a highly attractive and valuable piece of cut and polished mineral that is used in jewelry or other decorations
Translating Names of Minerals to Gemstones and Back ~ Gemstones can be made of one or more minerals and as a result some minerals refer to more than one gemstone name In order to better understand the interaction between the two reference the two charts below — the first details each gemstone and the minerals that combined to form it and the second lists each mineral and the gemstones it can produce
Minerals and Gems Smithsonian Institution ~ The Smithsonians mineral and gem collection at the National Museum of Natural History consists of approximately 350000 mineral specimens and 10000 gems making it one of the largest of its kind in the world Along with the speciments highlighted here the worldfamous Hope Diamond and hundreds of other spectacular items from the collection can be seen in the Smithsonian GeoGallery
Fossil Age Minerals Fossils Rock Minerals Gems Online ~ Our mineral collection includes raw gemstones such as amethyst and lapis lazuli We also carry popular scientific rock specimens such as malachite and pyrite Authenticity Guaranteed
Gemstone Comprehensive guide to Gemstones ~ Gemstones Mineral Dealers Online Reference Sites Mineral Publications Museums Gemstone Blogs Gemstone Show Advertising Information Welcome to the gemstone section a free informational reference guide to gemstones jewelry and precious metals Gemstones AZ Filter by Alphabet
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