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 Aventurine

A green quartz speckled with shimmering fuchsite mica that produces a glittering aventurescence, popular as an affordable ornamental stone.

A man-made glittering glass packed with tiny copper crystals, traditionally reddish-brown but also made in blue and green.

A group of green magnesium silicate minerals with a smooth, waxy feel, often carved and sometimes sold as imitation jade.

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