Rock & Mineral Encyclopedia

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

Lepidolite

A soft lithium-bearing mica with a lilac to purple color and pearly, flaky sheen, an important ore of lithium.

Natural emerald crystals still embedded in their host rock, prized as mineral specimens that show how the gem grew in place.

A quartz crystal containing pink to lilac lithium-bearing mineral inclusions that give a soft cloudy lavender or rose coloration.