mineral
Native gold (small nugget or grain)
Native gold, Au
AI-generated identification · may be incorrectMetallic yellow, opaque, with a metallic luster; Mohs hardness 2.5–3 and cubic crystal structure, though nuggets are irregular. The tiny specimen appears gold-colored, but the image alone cannot confirm its identity or purity.
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Physical properties
Metallic yellow, opaque, with a metallic luster; Mohs hardness 2.5–3 and cubic crystal structure, though nuggets are irregular. The tiny specimen appears gold-colored, but the image alone cannot confirm its identity or purity.
Formation & geological history
Forms in hydrothermal quartz veins and accumulates in river or stream placers after weathering; natural gold spans geological ages and settings.
Uses & applications
Used in jewelry, investment, electronics, dentistry, and mineral collecting.
Geological facts
Gold is exceptionally dense, malleable, and resistant to tarnish; natural grains are often alloyed with silver or copper.
Field identification & locations
A native-gold grain is typically soft and malleable, unlike brittle gold-colored pyrite; confirmation may require testing. Found in placer deposits and quartz veins worldwide.
