Gold Nugget

Physical Properties

Hardness: 2.5-3 (Mohs scale); Color: Metallic golden yellow; Luster: Metallic; Crystal Structure: Isometric (rarely visible in nuggets); Cleavage: None; Specific Gravity: 19.3 (pure)

Formation & Geological History

Formed in hydrothermal quartz veins via hot fluids in the Earth's crust. Most nuggets are found in secondary 'placer' deposits where they have been eroded from the primary source and concentrated by water in riverbeds.

Uses & Applications

Used extensively in jewelry, investment (bullion), electronics due to high conductivity, and dentistry. Nuggets themselves are often kept as high-value collector specimens.

Geological Facts

Gold is one of the least reactive chemical elements and is solid under standard conditions. Most of the Earth's gold lies in its core; the gold found in the crust was likely delivered by asteroid impacts.

Field Identification & Locations

Gold is identified by its high density (it feels very heavy for its size) and its malleability (it can be flattened but won't shatter). Unlike pyrite, it leaves a golden streak and does not tarnish easily.

Identified on: 5/2/2026

Mode: Standard