Auriferous Quartz Matrix Fragment
Raw Gold Ore (Matrix specimen) · Native Yellow Gold within silicate/iron-stained matrix
Purity: Indeterminate; native gold present in matrix is typically 20K-22K but total item gold content percentage is low
Type
Raw Gold Ore (Matrix specimen)
Purity
Indeterminate; native gold present in matrix is typically 20K-22K but total item gold content percentage is low
Gold Type
Native Yellow Gold within silicate/iron-stained matrix
Weight
150-250 grams (estimated based on palm size and typical density of quartz-heavy ore)
Description
A natural gold-bearing rock specimen consisting of a metamorphic or igneous matrix. The surface shows heavy mineralization with 'flour' or 'micro-fine' gold potentially embedded within the crevices. It appears as a common 'pay rock' sought by prospectors, exhibiting the heavy oxidation typical of gold-veined quartz reaching the surface.
Key Features
Heavy mineral content, presence of metallic flecks, characteristic heavy weight for its size (if high sulfur or iron content is present)
Color & Finish
Dull earthy grey and brown surface with small, bright metallic yellow specks; natural weathered finish with mineral oxidation
Hallmarks & Stamps
None; natural geological formation
Dimensions Estimate
70mm x 55mm x 15mm (approximate palm-sized rock)
Gemstones & Inlays
None; contains natural quartz, iron oxides, and possible pyrites or micaceous minerals
Clasp & Closure
Not applicable; raw mineral specimen
Chain & Links
Not applicable; solid geological matrix
Craftsmanship Details
Natural geological forces: hydrothermal deposition and tectonic pressure
Authentication Indicators
Visual 'fool's gold' check: metallic flecks that do not shatter when pressed and maintain color in shade (unlike mica/pyrite); red flag: most surface area is non-auriferous rock
Origin & Maker
Natural origin; likely from a lode deposit or alluvial wash
Era & Period
Geological Formation (Millions of years old); contemporary discovery
Age Estimate
Primary mineralization likely Precambrian to Cenozoic depending on locality
Cultural Significance
Represents the primary source of wealth for the '49ers' and modern mining operations; symbolizes the 'treasure in the rough' aspect of prospecting.
Condition Notes
Natural raw state; weathered edges suggest it may have been tumbled in a river or extracted from a surface outcrop; Fair as a gold specimen
Value Estimate
Specimen/Novelty value: $10-$50; Gold melt value: Likely negligible (less than 1 gram of recoverable gold total)
Care & Maintenance
Keep dry to prevent further oxidation of base metals; clean with soft brush and water only; do not use acids unless intending to leach the gold.
Similar Items
Iron Pyrite (Fool's Gold), Chalcopyrite, Micaceous Schist, or high-grade Gold Quartz specimens from the 16-to-1 Mine
Interesting Facts
Most gold is found locked inside rocks like this rather than as clean nuggets; it often takes crushing and chemical processing to extract the visible specks.