Sardonyx 6mm Hexagon - 15-16 Inch HPS09152022 a Greek philosopher and botanist

a Greek philosopher and botanist who also named the stone

The image shown has 3 cabochons to give you an idea of the range possibilites of the colors

It sometimes features dark brown to black dendritic inclusions that branch like tiny tree limbs through the stone

and comes in a range of other colors

however it does not exhibit the play of color seen in precious Opal

Sardonyx 6mm Hexagon - 15-16 Inch HPS09152022 a Greek philosopher and botanistSardonyx 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.