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.
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Gold
A dense, soft, intensely yellow native metal valued for millennia in coinage, jewelry, and electronics.
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Copper
A soft, reddish native metal with excellent conductivity, mined for wiring, plumbing, and alloys like bronze and brass.
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Silver
A soft, lustrous white native metal with the highest electrical conductivity, used in jewelry, coinage, and industry.
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