Rock & Mineral Encyclopedia

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

Yellow Labradorite

A transparent yellow to golden gem variety of labradorite feldspar, usually faceted to show its clear, warm color.

A coarse-grained intrusive igneous rock dominated by alkali feldspar with little or no quartz.

A dark gray-to-black feldspar variety of moonstone that shows blue and white adularescent flash against a smoky body.