Rock & Mineral Encyclopedia

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

Platinum

A dense, durable, silvery-white precious metal that resists corrosion, used in fine jewelry and catalytic converters.

A dense, soft, intensely yellow native metal valued for millennia in coinage, jewelry, and electronics.

A soft, reddish native metal with excellent conductivity, mined for wiring, plumbing, and alloys like bronze and brass.

A soft, lustrous white native metal with the highest electrical conductivity, used in jewelry, coinage, and industry.