Black Eye Agate 6mm Round 15-16 Inch Crystal Quartz orange and rust are due

orange and rust are due to traces of hematite within the stone

“Butter” suggests qualities of smoothness

but can be distinguished by its structure and its lower relative hardness

Shungite has been used as a folk medical treatment since the early 18th century

It also occurs in golden yellows and browns as well as milky white

Black Eye Agate 6mm Round 15-16 Inch Crystal Quartz orange and rust are dueBlack 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.