Gold Nugget

Physical Properties

Hardness: 2.5-3.0 on Mohs scale; Color: Golden yellow to brassy yellow; Luster: Metallic; Crystal Structure: Isometric/Cubic (often found as irregular masses or flakes); Cleavage: None; Specific Gravity: 19.3 (very heavy).

Formation & Geological History

Primary deposits form in hydrothermal quartz veins through precipitation from hot, mineral-rich fluids. Secondary (placer) deposits form when gold is eroded from rocks and concentrated by water in stream beds due to its high density.

Uses & Applications

Used extensively in jewelry, electronics for its high conductivity, dentistry, and as a financial investment/reserve. Highly valued by collectors for natural shape.

Geological Facts

Gold is one of the most non-reactive chemical elements and does not tarnish. Nearly all the gold ever mined is still in existence today in some form. Small flakes or nuggets like the one shown are often found by recreational prospectors.

Field Identification & Locations

Identify in the field by its high density (it will stay in the bottom of a pan), malleability (it bends rather than shatters), and metallic luster that remains bright even in shade. Commonly found in quartz veins and alluvial river deposits.

Identified on: 5/7/2026

Mode: Standard