Rock & Mineral Encyclopedia

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

Paintbrush Agate

A plume agate whose inclusions form upright, bristly clusters resembling the strokes of a paintbrush.

A scenic jasper whose flowing streaks of warm color resemble strokes left by a loaded paintbrush.

Precious opal from the Andamooka field of South Australia, famous for solid crystal opal and its distinctive treatable matrix opal.

A landscape-patterned Chinese jasper prized for warm cherry-red, cream, and green bands resembling painted scenery.