Adamantine - "Diamond-like luster and hardness," derived from the Greek word adamas (invincible) for diamonds. Adularescence - The billowing shimmer of light floating across the surface of a moonstone. Agate - A quartz crystal and a sub-variety of chalcedony located in a wide assortment of pale colors including green, yellow, red, reddish-brown, white and bluish white. Assessing a 6.5-7 on Mohs' scale of hardness, agate has a waxy or dull luster. Located in parts of southern Brazil, northern Uruguay, Australia, China, India, the Caucasus, Madagascar, Mexico, Mongolia, Namibia, Wyoming, and Montana. Alexandrite - A highly prized variety of chrysoberyl that looks grassy green in daylight, and in tungsten light seems raspberry red. On Mohs' scale of hardness, alexandrite is 8.5. It's a strong vitreous luster and can be seen at Sri Lanka, Zimbabwe, and Brazil. Almandite/Almandine - A variety of garnet generally found at a violet red hue. Measuring 7.5 on Mohs' scale of hardness, almandite has a vitreous luster and can be located in Brazil, India, Madagascar, Sri Lanka and the United States. Amber - A fossilized, organic combination of pine resins, acids and volatile oils which comes in the tree sap of the pine tree. Predominantly found in yellow and brown colors, amber measures 2-2.5 on Mohs' scale of hardness and has a vitreous luster and a resinous sheen when polished. Amber is found in Russia, Sicily/Italy, Rumania, Burma, China, the Dominican Republic, Japan, Canada, Mexico, Alaska and New Jersey. Amethyst - The most highly valued gemstone in the quartz family and discovered in a variety of colors from purple to pale red-violet. On Mohs' scale of hardness, amethyst is 7 and it's located in Brazil, Madagascar, Zambia, Uruguay, Burma, India, Canada, Mexico, Namibia, Russia, Sri Lanka and Arizona Here is a blog for tool help Ametrine - A quartz crystal which contains amethyst and citrine measuring 7 on Moh's scale of hardness. Ametrine is primarily found in Bolivia. Amorphous - Amorphous is an adjective meaning shapeless or lacking crystal structure (like Amber). Andalusite - A naturally occurring pleochroic gemstone. Since the stone is rotated, different colours and different intensities of colors can appear such as olive green, rich red brown or grayish green. It's a vitreous or mat luster and primary sources include Australia, Brazil, Canada, Russia, Spain, Sri Lanka and the United States. Andradite - A species of diamonds inside the garnet family which includes several important gem varieties such as demantoid, melanite and topazolite. On Mohs' scale of hardness, it's 3.7 -- 4.1. Apatite - A naturally occurring beautiful gemstone, while known for its green hues, apatite can actually be found in a vast array of colors from colorless to pink, yellow, blue and purple. On Mohs' scale of hardness, apatite is a soft 5. It has a vitreous luster and is found in Burma, Brazil, India, Kenya, Madagascar, Mexico, Norway, Sri Lanka, South Africa and the United States. Aquamarine - A part of the beryl family, is known for its clear sky-blue colour but is also found in a variety of dark blues to blue-greens. Measuring a 7.5-8 on Mohs' scale of hardness, aquamarine
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