Geology Home Page
Roger Weller, geology instructor
Chemical Group: native element
Chemical Formula: Au (gold)
Color: gold-yellow, sometimes pale-yellow Streak: gold-yellow
Hardness: 2.5 to 3
Specific Gravity: 15.6 to 19.33 (pure)
Luster: metallic Malleability: extremely malleable
Gold forms distorted an often elongated crystals of octahedrons, cubes, and dodecahedrons.
Gold also forms dendrites.
Mineral Associations: commonly found in milky quartz
Identifying Characteristics: color, softness, malleability
Uses: tooth fillings, electrical contacts, jewelry, coins
Toxicity: when-swallowed- low when inhaled- low
Additional Information: Native gold is often alloyed with silver; silver content ranging up to 16%.