Colour: Most commonly black, but can range from colorless to brown, red, orange, yellow, green, blue, violet, pink, or hues in-between. It can also be bi-colored, or even tri-colored. Rarely, it can be found as neon green or electric blue.
Density: 2.82 – 3.32
Crystal System: Trigonal
Transparency: translucent to opaque
Lustre: Vitreous: This luster resembles broken glass, offering a bright and glassy shine. It's common in transparent and translucent minerals like quartz or calcite.
Type: Gemstone
Mohs Hardness: 7.5

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