Rock & Mineral Encyclopedia

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

Bamboo Agate

An agate whose layered, segmented banding resembles the jointed stalks and leaves of bamboo.

A banded, metamorphosed iron formation in which bright red jasper alternates with silvery hematite or magnetite layers.

A richly colored red banded agate prized by lapidaries for its deep crimson-to-brown tones reminiscent of pigeon's blood.

A chalcedony agate with red, orange, and yellow plume or banding patterns that rise like dancing flames within the stone.