Rock & Mineral Encyclopedia

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

Scenic Agate

A translucent agate whose mineral inclusions resemble miniature landscapes of trees, hills, and horizons within the stone.

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

A golden-toned opal ranging from translucent common opal to precious stones flashing color against a warm yellow body.

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

A warm golden-to-amber opal ranging from translucent common opal to precious stones that flash play-of-color over a honey body.

A translucent chalcedony from Montana filled with black and red dendritic inclusions that look like moss, ferns, or scenic landscapes.

A vivid Australian jasper-like silica stone in earthy reds, yellows, and purples, formed from silicified radiolarian sediment.