Rock & Mineral Encyclopedia

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

Orbicular Granite

A rare granitic rock containing concentric, onion-like spheres called orbicules, prized as a striking ornamental stone.

A chalcedony agate marked by round, concentric ring patterns that resemble eyes when cut and polished.

A prized Mexican jasper known for pastel green, lavender, and cream orbicular patterns that take an exceptional polish.