Rock & Mineral Encyclopedia

Search and identify 1,000+ rocks, minerals, crystals, and gemstones — with properties, formation, colors, hardness, and how to tell them apart.

Onyx Marble

Translucent banded calcium-carbonate stone deposited in caves and springs, prized for ornamental carvings despite its softness.

A water-bearing massive grossular garnet, usually green or pink, widely used as a tough jade-like carving stone.

A deep black variety of banded chalcedony, often closely related to or treated like onyx, used for jewelry and carvings.

A rich green, fuchsite-rich metamorphic rock from southern Africa, prized as a carving and ornamental stone.

The soft pink, usually cloudy variety of quartz colored by trace titanium or microscopic inclusions, popular for carvings and beads.