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 Jasper

An opaque green variety of chalcedony quartz colored by iron and chlorite-group inclusions, prized as a durable carving and cabochon stone.

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

Green tourmaline cut as a cabochon to show a sharp moving band of light (chatoyancy) caused by fine parallel inclusions.

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

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