Beautiful faceted sardonyx beads. Sardonyx has a Sard base, typically brown or black, with bands of white Onyx running through it. Sardonyx is not Onyx, but rather a dark variety of Carnelian. Faceted sardonyx beads, faceted round, natural beads, sardonyx, beads. Measure 6mm. Sold by thirty (30) piece temp-strung packages.