Beautiful glossy big Black Onyx faceted nugget beads measuring on average 20x16mm in size. Sold by the individual bead.

Black Onyx is a solid black form of onyx without the banding (as in Sardonyx) and is another variety of microcrystalline quartz and a form of chalcedony. Our black onyx tends to be very black but can have occasional brown in it, especially in larger examples.