Auriferous Quartz Stream Cobble (Raw Gold Specimen)
Raw Gold (Nugget in Matrix) · Natural Native Gold (Alloyed with trace silver and iron)
Purity: Estimated 20K-23K (83%-96%) naturally occurring native gold within host rock
Type
Raw Gold (Nugget in Matrix)
Purity
Estimated 20K-23K (83%-96%) naturally occurring native gold within host rock
Gold Type
Natural Native Gold (Alloyed with trace silver and iron)
Weight
Estimated total weight 150-300 grams; actual gold content unknown without specific gravity testing
Description
This is a raw auriferous (gold-bearing) quartz cobble. The specimen features visible native gold inclusions embedded within a weathered quartz matrix. This type of discovery is common in gold-bearing riverbeds where erosion has tumbled the rock smooth over centuries. Unlike processed bullion, this represents the natural state of gold before extraction.
Key Features
Heterogeneous mineral matrix, dull natural gold luster, tumbled river-rock texture, lack of geometric refining
Color & Finish
Natural buttery yellow gold with a dull/weathered stream patina; host rock is a mix of white quartz and grey-brown river silt
Hallmarks & Stamps
None; naturally occurring mineral specimen
Dimensions Estimate
Approximately 6cm x 4cm x 3cm (Palm-sized cobble)
Gemstones & Inlays
None; host matrix consists of crystalline Quartz and secondary iron-stained minerals
Clasp & Closure
Not applicable; raw mineral specimen
Chain & Links
Not applicable; naturally formed geological structure
Craftsmanship Details
None; fashioned by natural geological forces (hydrothermal deposition and river erosion)
Authentication Indicators
Irregular shape of gold inclusions consistent with natural formation; lack of cast lines or artificial plating indicators; variation in color consistent with native alloys
Origin & Maker
Unknown geographic origin; likely from an alluvial river deposit or hydrothermal vein
Era & Period
Contemporary Geological Discovery (Natural mineral formation millions of years old)
Age Estimate
Formation: Millions of years; Discovery: Modern
Cultural Significance
Represents the historical 'Gold Rush' style of discovery; symbolizes raw wealth and the geological heritage of the earth
Condition Notes
Natural weathered condition; surface displays typical stream erosion, pitting, and calcium/mineral deposits. Grade: Raw Specimen
Value Estimate
Specimen value: $50 - $200 depending on total gold weight and buyer interest; primarily based on gold spot price and aesthetic rarity
Care & Maintenance
Keep dry; do not use harsh chemicals or ultrasonic cleaners which could break the host rock; clean with soft brush and distilled water only
Similar Items
Gold-bearing ironstone, gold nuggets, gold ore specimens, pyrite (Fool's Gold)
Interesting Facts
Most gold is found in quartz veins; finding 'visible gold' in a rock this size is statistically rare and highly sought after by prospectors