8x6mm Faceted oval cabochon - Black Onyx x1

8x6mm oval faceted flat back cabochon to be glued or set - Black Onyx.

Black onyx stone is not originally black. It is treated by being immersed in a solution of black sugar and acid. The soft, porous nature of the stone allows the solution to soak in. After immersion, the stone is then heated. This is a common process that makes the colour deeper and longer lasting.

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Details :
Length: 8 mm
Width: 6 mm
Thickness: circa. 2.6 mm
Be careful, each piece is unique and may present important differences with the photo.

Sold by 1 piece.