Black Eye Agate 6mm Round 15-16 Inch Crystal Quartz but can be distinguished by

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

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

Hydrogrossular garnet is an especially rare gemstone

but rather a speckled teal Jasper found in Africa and often treated to simulate the beautiful blue to green associated with true Turquoise

Black Eye Agate 6mm Round 15-16 Inch Crystal Quartz but can be distinguished byBlack 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.