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” Tourmaline is unusual in that it is both pyroelectric and piezoelectric
The presence of Manganese in the stone produces its color
characterized by its color range of black
Enthusiasm
Mother of Pearl 15mm A Grade Coin Cabochon Spint Oyster ” Tourmaline is unusual inMother of Pearl, also known as Nacre, is an iridescent composite of organic and inorganic material most known for being the coating of pearls. It is produced by certain molluscs as an inner shell layer, and forms around pieces of sand or other irritations within such a molluscs shell to create pearls. Mother of Pearl is white with an iridescent sheen. Sold individually. These cabochons are all unique and vary in colors and patterns. The image shown
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