Sardonyx 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.
Stones are treated with a dye to alter or enhance their color.
4mm round stones
8" strand. Approximately 52 beads
Hole size approximately 0.8 - 1.1mm
These are Dakota Stones