Rock & Mineral Encyclopedia

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

Picture Jasper

An opaque brown chalcedony whose iron-stained banding mimics deserts, dunes, and distant mountain skylines.

A jasper made of angular fragments naturally cemented back together, typically showing red and brown pieces in a quartz matrix.

A warm golden-to-amber variety of calcite, a soft calcium carbonate mineral valued for its honeyed glow and easy carving.

A warm golden to amber translucent chalcedony agate whose color and glow resemble honey, sometimes with banding.

A translucent quartz speckled with glittery mineral inclusions that produce a shimmering aventurescence, most often green.

A translucent chalcedony filled with green or brown dendritic mineral inclusions that resemble moss, foliage, or landscapes.

A translucent chalcedony agate whose mineral inclusions form miniature scenes resembling mountains, trees, deserts, and skies.

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

Siderite is an iron carbonate ore, a brown rhombohedral mineral of the calcite group found in sediments and veins.

A pale translucent chalcedony threaded with brown-black manganese and iron dendrites that mimic tiny ferns, mosses or landscapes.