Rock & Mineral Encyclopedia

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

Starry Night Jasper

A dark jasper trade stone speckled with pale flecks resembling a starry night sky, valued for its cosmic appearance.

Agate containing radiating sprays of mineral needles that fan out like bursting stars within the chalcedony.

Black volcanic glass dotted with radiating spherulite bursts that look like exploding fireworks frozen in the stone.

Obsidian containing spherulites — small radiating spheres of feldspar and cristobalite that crystallized within the cooling volcanic glass.

A translucent Wyoming chalcedony filled with delicate black manganese dendrites that resemble tiny ferns, moss, or starbursts.

A chalcedony agate filled with radiating needle-like mineral inclusions, prized for its starburst and spray patterns.