Black Eye Agate 4mm Round - 15-16 Inch Stone Type_Beryl The Peruvian material has a

The Peruvian material has a lighter tone of Pink than deposits found in other parts of North and South America

Hematite is black to steel to gray or silver to gray

Crystal Quartz is a naturally occurring clear and colorless Quartz

Sardonyx is sometimes treated to bring out its reddish tones

Black Eye Agate 4mm Round - 15-16 Inch Stone Type_Beryl The Peruvian material has aBlack 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.