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Natural Black & White Onyx Gemstone - Cabochon Oval 12mm x 46mm Pkg - 1 Natural Black & White Onyx Gemstone - Cabochon Oval 12mm x 46mm Pkg - 1 Natural Black & White Onyx Gemstone - Cabochon Oval 12mm x 16mm Pkg - 1 Natural Black & White Onyx Gemstone - Cabochon Oval 12mm x 16mm Pkg - 1
Natural Black Onyx Gemstone - Cabochon Oval 10x12mm - Pak of 1 Natural Black Onyx Gemstone - Cabochon Oval 6x8mm Natural Black Onyx Gemstone - Cabochon Oval 8x10mm - Pak of 2
   
 

Onyx

Onyx is a form of chalcedony quartz. Many of these striking stones display white bands or ribbons against a black background. Some may include tan or brown stripes running along side the white detail. Our cabochons are flat on both sides and polished beautifully. Find a setting to fit yours in our settings section under tools & equipment.

For firing temperature and time on a variety of gemstones, refer to our Gemstone Firing Guide: