sardonyx

An onyx with alternating brown and white bands of sard and other minerals.

A chalcedony or agate consisting of two or more layers of brown or red combined with white or other color. Since about 1870 the name has been given to a chalcedony stained with various shades of red to deep brown.

In heraldry, a tincture, the color murrey or sanguine, when blazoning is done by precious stones.

A variety of onyx consisting of sard and white chalcedony in alternate layers.

A gemstone having bands of red sard; a variety of onyx or chalcedony.

an onyx characterized by parallel layers of sard and a different colored mineral