Black Eye Agate 10mm Round 15-16 Inch

Black Eye Agate is a variety of Sardonyx which 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.