Onyx is formed as the result of water dissolving existing limestone and re-depositing it as a new kind of stone. In limestone caves, onyx is formed by drip water, much like stalagmites and stalactites. Onyx is a banded variety of Chalcedony, a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite.


The colours in the bands range from white to every colour imaginable in many hues. It is produced with a polished  finish and is only available in 2cm thickness. Its main feature being a translucent silky luminosity. Used widely in the Roman era, the word Onyx is taken from the Latin word derived from early Greek meaning claw or fingernail. Each type and colour of Onyx varies enormously in colour and banding.

Onyx can look quite stunning when back lit with white light and is suitable for use in bathrooms and for fireplace surrounds, but is not suitable for kitchen worktops.

Onyx Bespoke Special Order

Please ask if we currently have any in stock.

Landford Stone