Natural Extra Fine Black Onyx - Rectangle Buff Top Cabochon - AAA+ Grade

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100% Earth Mined

No Synthetics, No Simulants

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MM size is the best measurement to select the right gemstone size. All gem carat weights are approximate.

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Gemstone Report

Natural Onyx

Species: Chalcedony

Shape/Cut: Rectangle Buff Top Cabochon - Single Bevel - SBBT

Clarity: Clean +

Color: Extra Fine Black

Polish: Excellent

RI: 1.535-1.539

Specific Gravity: 2.6

Hardness (Mohs): 6.5-7

Treatment: Dyed (Standard)

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