Gold Nugget

Physical Properties

Hardness: 2.5–3 on Mohs scale; Color: Golden yellow to brassy yellow; Luster: Metallic; Crystal Structure: Isometric (cubic), though usually found in irregular or dendritic forms; Cleavage: None; Specific Gravity: 19.3 (very high).

Formation & Geological History

Formed through hydrothermal processes in quartz veins or as placer deposits in riverbeds. Erosion of gold-bearing rocks releases the metal, which settles in water due to its extreme density. Age varies by location (from Archean to Cenozoic).

Uses & Applications

Currency, jewelry, electronics, dentistry, industrial plating, and as a highly sought-after investment or collector's specimen.

Geological Facts

Gold is one of the least reactive chemical elements and is solid under standard conditions. Most gold found in nature is alloyed with silver (electrum) or copper. It is so malleable that a single ounce can be beaten into a sheet covering 100 square feet.

Field Identification & Locations

Identify by its high density (heavy for its size), sectility (can be cut with a knife), and metallic luster that does not tarnish. Common in Alaska, Australia, California, and South Africa. Collectors look for specific 'crystalline' nugget shapes.

Identified on: 4/23/2026

Mode: Standard