Rock & Mineral Encyclopedia

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

Green Opal

A common opal colored green by nickel or chromium impurities, usually opaque and cut into cabochons and beads.

A soft, pastel minty-green tourmaline prized for its fresh, light color, a delicate variety of green elbaite.

A soft-toned, multicolored jasper with swirling green, mauve, and cream patterns, popular and affordable in the bead trade.

An affordable multicolored banded and mossy chalcedony from India, common in tumbled stones, beads, and meditation pieces.

A translucent common opal from the Andes prized for its serene blue to blue-green color, usually cut into cabochons and beads.