Rock & Mineral Encyclopedia

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

Jadeite

The rarer and more valuable of the two jade minerals, prized for its translucent emerald-green 'imperial' color and extreme toughness.

A trade name for quartz containing a combination of seven minerals including amethyst, smoky quartz, and cacoxenite, prized by collectors.

A green-and-white banded metamorphic marble whose wavy mica layers resemble the rings of a sliced onion.

The barium end-member of the feldspar group, represented by celsian, occurring in barium-rich metamorphic and manganese deposits.