Gold

Physical Properties

Hardness: 2.5-3.0 Mohs; Color: Metallic yellow; Luster: Metallic; Crystal Structure: Isometric (Cubic); Cleavage: None; Specific Gravity: 19.3 (pure)

Formation & Geological History

Primary deposits form in hydrothermal quartz veins and volcanogenic massive sulfide deposits. Secondary deposits form via erosion into alluvial placer deposits in riverbeds.

Uses & Applications

Dominantly used in jewelry, as currency/investment bullion, in electronics due to conductivity and corrosion resistance, and in dentistry.

Geological Facts

Gold is incredibly ductile; a single ounce can be drawn into a wire 50 miles long. It is also one of the few colored metals and is chemically inert (won't rust).

Field Identification & Locations

Identify by its high density (heaviness), malleability (it bends/dents rather than shattering), and sectarian metallic luster that doesn't tarnish. Commonly found in quartz veins or as nuggets in streams.

Identified on: 4/21/2026

Mode: Standard