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 Calcite

A soft mint-to-apple-green variety of calcite, a common calcium carbonate mineral popular as soothing tumbled stones.

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

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

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