Rock & Mineral Encyclopedia

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

Maligano Jasper

A rare Indonesian jasper from Sulawesi known for ghostly tube structures, brecciated patterns, and contrasting grey, red, and purple zones.

A multicolored orbicular chalcedony from Madagascar famous for its circular eye-like orbs in greens, pinks, whites, and yellows.

A colorful trade-name material, often dyed and reconstituted, sold as jasper; vivid blues and greens are typically artificially enhanced.

Quartz colored blue by inclusions of the mineral dumortierite, giving a denim-like blue ornamental stone harder than dumortierite alone.

A feldspar gem famous for adularescence, a floating blue-white glow that shimmers across the stone like moonlight.

A chalcedony agate with red, orange, and yellow plume or banding patterns that rise like dancing flames within the stone.

A sought-after elbaite tourmaline in teal hues that blend blue and green, prized for its ocean-like color.

A water-bearing massive grossular garnet, usually green or pink, widely used as a tough jade-like carving stone.

A precious opal showing dominant peacock-like blue, green and teal play-of-color, often on Ethiopian material.