Rock & Mineral Encyclopedia

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

Unakite Jasper

An altered granite of pink feldspar, green epidote and quartz, mottled pink-and-green and popular as a tumbled and carving stone.

A Norwegian intrusive rock whose feldspar crystals flash silvery-blue, widely used as blue pearl granite countertops.

A distinctive tourmaline-rich granite from Cornwall, prized as an ornamental stone for its pink feldspar set with radiating black tourmaline.

A pegmatitic granite in which quartz and feldspar intergrow to resemble ancient runic or Hebrew script.

A trade term for orange garnets, mainly manganese-rich spessartine and the brownish hessonite variety of grossular.

An altered granite mottled pink and green from feldspar and epidote, popular as a tough, colorful ornamental rock.

A near-colorless feldspar showing blue and multicolored sheen; gemologically a white labradorite rather than true orthoclase moonstone.

An Australian green rhyolite with eye-like orbs and earthy patterns marketed as jasper, evoking dense rainforest foliage.

A common coarse-grained intrusive rock like granite but richer in plagioclase than potassium feldspar.

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

A striking platy, blade-like variety of albite feldspar that grows in fanned aggregates of thin white crystals within granite pegmatites.

A green ornamental stone, often serpentine-rich marble or verde antique, valued for its rich green color and white veining.