Black Onyx Polished Crystal Tumblestones

Onyx primarily refers to the parallel banded variety of chalcedony, a silicate mineral. Agate and onyx are both varieties of layered chalcedony that differ only in the form of the bands: agate has curved bands and onyx has parallel bands. The colours of its bands range from black to almost every colour.  

Dimensions: See options.

Origin: Brazil

Crystals are a natural product and may come with small imperfections.