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Available in ALL Cuts (Faceted, Cabochon, Step, Brilliant, Mixed) and ALL Sizes (Calibrated and Free-size)
Onyx
Origins
Brazil · India · Uruguay · USA
Black Onyx is a variety of chalcedony with a deep, uniform black color that provides a dramatic backdrop for gold and silver settings. Its smooth, waxy luster makes it ideal for cabochon cuts, while its hardness (7 on Mohs) ensures durability in all jewelry types. We offer black onyx in all standard calibrated sizes and custom shapes.
Available Colors
Varieties Available
All Cuts Available
Interested in Wholesale Onyx?
Contact us via WhatsApp with your requirements — color, cut, size, and quantity. We respond within hours.
Inquire About Onyx via WhatsAppInternationally Certified Gemstones
GIA
Est. 1931 · USA
Gemological Institute of America — the global standard for diamond and colored stone grading.
AGL
Est. 1977 · USA
American Gemological Laboratories — renowned for ruby, sapphire & emerald origin reports.
Gübelin
Est. 1923 · Switzerland
Gübelin Gem Lab — Switzerland's premier laboratory for provenance and treatment analysis.
GRS
Est. 1996 · Switzerland
GemResearch Swisslab — specialist in colored stone grading and origin determination.
Certificates available on request. Pricing for certification is separate and quoted per stone.
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Any Cut · Any Size Available
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