Rock & Mineral Encyclopedia

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

Rutilated Quartz

Clear or smoky quartz threaded with golden to reddish needles of rutile, also poetically called Venus hair stone.

A green quartz speckled with shimmering fuchsite mica that produces a glittering aventurescence, popular as an affordable ornamental stone.

A pure, translucent white marble from the Greek island of Paros, the preferred stone of ancient sculptors for its waxy glow.

A green ornamental stone, often serpentine-rich marble or verde antique, valued for its rich green color and white veining.

A rare granitic rock containing concentric, onion-like spheres called orbicules, prized as a striking ornamental stone.

A banded rhyolitic volcanic rock with swirling tan, red, and yellow iron-oxide layers prized as a decorative picture stone.

A rare black carbon-rich rock from Russia, noted for containing fullerenes and ranging from dull mineralized stone to lustrous noble shungite.