Rock & Mineral Encyclopedia

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

Platinum

A dense, durable, silvery-white precious metal that resists corrosion, used in fine jewelry and catalytic converters.

A dense, soft, intensely yellow native metal valued for millennia in coinage, jewelry, and electronics.

A soft, lustrous white native metal with the highest electrical conductivity, used in jewelry, coinage, and industry.

A soft, reddish native metal with excellent conductivity, mined for wiring, plumbing, and alloys like bronze and brass.

A bright strawberry-red garnet, typically an almandine-pyrope blend prized for its juicy, lively red color in jewelry.

A common opal with branching, tree-like mineral inclusions that create natural fern, moss, or landscape patterns.

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

A translucent chalcedony decorated with branching, fern-like manganese or iron oxide inclusions resembling tiny plants.

A bold black-and-white banded chalcedony named for its orca-like coloring, popular as carvings and statement jewelry.

A translucent chalcedony agate containing delicate, feather- or plume-shaped mineral inclusions that branch like soft feathers.