MATTE Purple Sardonyx (dyed) 10mm Star Cut Round - 15-16 Inch Hydroxyapatite It is believed by some

It is believed by some to improve memory and increase analytical skills

though it is referenced as a highly revered stone in much older Inuit tribal legends

creamy white to pale gray or beige

meaning it becomes magnetically charged from heat or friction

MATTE Purple Sardonyx (dyed) 10mm Star Cut Round - 15-16 Inch Hydroxyapatite It is believed by someSardonyx 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.