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depending on the specific composition of the stone and its surface finish
it has a density ranging from 1
This Amber has some blues
and clarity of thought
with variations in shades depending on the amount of lead and other minerals in the crystal
Black Tourmaline - Brazil - 10 pounds Green depending on the specific compositionMixed Sizes. Mostly multiple pieces per pound. Local: Brazil 1. Color: As the name suggests, black tourmaline typically exhibits a deep black color, although it can sometimes have a slight brownish tint. It often occurs in long, prismatic crystals, but can also be found in massive formations. 2. Hardness: Black tourmaline has a hardness of 7 to 7. 5 on the Mohs scale, making it relatively durable and resistant to scratching. 3. Clarity: Black
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