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Focal, black onyx (dyed), 50mm round donut, B grade, Mohs hardness 6-1/2 to 7. Sold individually.
Item Number: H20-6295NB
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Onyx is a form of chalcedony, which is a microcrystalline quartz. Black onyx is commonly believed to have protective qualities, making it advantageous to carry while traveling.
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