Black Tourmaline B Aragonite These fossils are found in

These fossils are found in sedimentary rock layers of limestone

manganese oxide

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Amethyst was considered a precious gem until the 18th century when large deposits were discovered in South America

this natural crystal cluster features a glittering druzy surface that catches the light beautifully

Black Tourmaline B Aragonite These fossils are found inBlack 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 1 inch in height, 1. 4 inches in length, and 1 inch in width. Weighing 1. 8 ounces.