Black Sardonyx 6x8mm Corner Drilled Table Cut Cube Bead - 15-16 Inch Size_4-6 The word "beryl" is derived

The word "beryl" is derived from the Greek beryllos

often occurring with inclusions of white

but takes a trained eye and a microscope to discern the difference between this material and the Jade it is named after

Sardonyx is sometimes treated to bring out its reddish tones

Black Sardonyx 6x8mm Corner Drilled Table Cut Cube Bead - 15-16 Inch Size_4-6 The word "beryl" is derivedSardonyx has a Sard base, typically of brown or black, with bands of white Onyx running through it. Sard is not Onyx, but rather a dark variety of Carnelian. Sardonyx is sometimes treated to bring out its reddish tones. It is believed by some to improve memory and increase analytical skills.