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 translucent quartz speckled with glittery mineral inclusions that produce a shimmering aventurescence, most often green.

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