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Mohs Hardness: 7
creamy white to pale gray or beige
so it fractures easily
famed mineralogist and jeweler George Frederick Kunz
Good question
Black Tourmaline 8mm Round A Grade - 15-16 Inch Tone Mohs Hardness: 7Black Tourmaline is a black crystalline aluminum borosilicate mineral with occasional light gray inclusions that appear as flecks or veins. Tourmaline is classified as a semiprecious stone and occurs in a vast array of colors, everything from colorless to black, from pastel to bright to dark. It can even exhibit various colors within the same specimen. Its name derives from the Sinhalese word turamali, which translates to stone of many colors. Due to
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