Auriferous Quartz Matrix (Gold-Bearing Ore Sample)
Raw Gold Ore (Lode Deposit) · Natural Native Gold; often alloyed with traces of silver (Electrum) or copper.
Purity: Varies by specimen; native gold in quartz is typically 20K to 23K (83% - 96% pure) before refining.
Type
Raw Gold Ore (Lode Deposit)
Purity
Varies by specimen; native gold in quartz is typically 20K to 23K (83% - 96% pure) before refining.
Gold Type
Natural Native Gold; often alloyed with traces of silver (Electrum) or copper.
Weight
Total specimen estimated at 250 - 450 grams; gold content is likely measured in milligrams unless visible veins are present internally.
Description
A rugged, iron-stained quartz matrix specimen showing significant mineralization. The rock exhibits a 'honeycomb' or 'vuggy' texture where sulfides may have leached out, often leaving behind high-purity gold. Small yellow metallic inclusions are visible within the quartz cavities.
Key Features
Gossanous texture (rusty cap), quartz crystal clusters, and heavy iron-oxide mineralization which are primary indicators for lode gold deposits.
Color & Finish
Naturally occurring unrefined yellow gold specks; earthy iron-oxide staining (limonite/hematite) providing a rusty-red to dark brown secondary color.
Hallmarks & Stamps
None; being a raw geological specimen, it lacks any man-made markings or refinery stamps.
Dimensions Estimate
Approximately 8cm x 7cm x 4cm (Width x Height x Thickness); handheld size.
Gemstones & Inlays
Macro-crystalline quartz (SiO2) clusters; no precious gemstones, but contains druzy quartz and potentially iron-rich inclusions.
Clasp & Closure
Not applicable; raw mineral specimen.
Chain & Links
Not applicable; rough-hewn geological fracture surfaces on host rock.
Craftsmanship Details
None; natural geological formation shaped by hydrothermal fluids and tectonic pressure.
Authentication Indicators
Sectility (gold can be cut or dented, unlike pyrite which shatters), color consistency in shadow, and high specific gravity compared to surrounding rock.
Origin & Maker
Naturally occurring geological deposit; likely from an artisanal or small-scale mine (ASM).
Era & Period
Geological Formation (likely Cenozoic or Mesozoic era depending on regional geology); modern extraction.
Age Estimate
Millions of years old (formation age); recently extracted from host rock.
Cultural Significance
Symbolizes the 'Gold Rush' heritage and the primary source of wealth for many developing nations through artisanal mining.
Condition Notes
Raw/Unprocessed. Significant oxidation on the surface (limonite staining); structural integrity is characteristic of brittle quartz.
Value Estimate
Primarily as a mineral specimen ($50–$150) rather than melt value, as the actual gold weight is likely minimal compared to host rock weight.
Care & Maintenance
Keep dry to prevent further oxidation of associated sulfide minerals; clean only with water and a soft brush to avoid dislodging small gold flakes.
Similar Items
Iron Pyrite (Fool's Gold) in matrix—pyrite is more brassy, cubic, and brittle compared to native gold's buttery yellow and malleability.
Interesting Facts
The majority of the world's gold has been extracted from quartz veins just like this; it is estimated that only 1 in 10,000 such rocks contains enough gold to be economically viable for large-scale mining.