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Aventurine is a variety of Quartz characterized by bright inclusions of Mica or other minerals that give a shimmering or glistening effect to the stone
Moss Agate is a variety of microcrystalline quartz chalcedony
rose-pink rhodochrosite
Collectors prize its shiny iridescent effect
Black Tourmaline A Sea Biscuit Aventurine is a variety ofBlack Tourmaline, scientifically known as Schorl, can originate from the crystallization of molten rock deep within Earth's crust. It has a hardness of 7 7. 5 on Mohs scale with a trigonal crystal structure. The black color is often due to the presence of iron impurities within the crystal structure. This particular specimen is from Namibia, South Africa. Measuring . 6 inches in height, 1. 2 inches in length, and 1 inch in width. Weighing 1. 2 ounces.
