MATTE Purple Sardonyx (dyed) 10mm Star Cut Round - 15-16 Inch *CHKRA-ORG Black Tourmaline is a black

Black Tourmaline is a black crystalline aluminum borosilicate mineral with occasional light gray inclusions that appear as flecks or veins

and is similar to Mahogany

producing the effect of the stone seeming to shine from within

and veins within the tan

It is often thought of as an all-black stone

MATTE Purple Sardonyx (dyed) 10mm Star Cut Round - 15-16 Inch *CHKRA-ORG Black Tourmaline is a blackSardonyx 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.