Auriferous Quartz Specimen with Iron Pyrite and Ferruginous Inclusions
Raw Gold Ore (Lode Gold in Matrix) · Native Gold in Quartz with Sulfide Minerals
Purity: Natural unrefined gold (if present) typically ranges from 70% to 95% (17K-23K); however, the visible yellow metallic lustres in this specimen primarily indicate Iron Pyrite (Fool's Gold) or Chalcopyrite within a silicate matrix.
Type
Raw Gold Ore (Lode Gold in Matrix)
Purity
Natural unrefined gold (if present) typically ranges from 70% to 95% (17K-23K); however, the visible yellow metallic lustres in this specimen primarily indicate Iron Pyrite (Fool's Gold) or Chalcopyrite within a silicate matrix.
Gold Type
Native Gold in Quartz with Sulfide Minerals
Weight
4 lbs 0.4 oz (approximately 1,825 grams)
Description
This is a substantial specimen of vein-hosted quartz ore. It displays a classic hydrothermal sandwich structure where white quartz has injected into a darker country rock. The heavy iron staining (rust color) suggests the oxidation of sulfide minerals, a common indicator for prospectors seeking gold. The brassy yellow flecks visible are suggestive of iron pyrite, though native gold may reside within the fractures.
Key Features
High quartz-to-waste-rock ratio, significant iron oxide staining (indicator mineral), and distinct mineralization zones.
Color & Finish
Natural raw earth tones: milky white quartz, rusty reddish-brown (limonite/hematite staining), charcoal grey host rock, and brassy yellow metallic mineralizations. Surface is rough, unpolished, and fractured.
Hallmarks & Stamps
None; being a natural mineral specimen, it lacks man-made regulatory marks. It features geological 'hallmarks' of hydrothermal vein formation.
Dimensions Estimate
Approximately 6 x 4 x 3 inches (based on scale size and weight volume)
Gemstones & Inlays
No faceted gemstones; contains massive crystalline quartz and potentially microscopic gold particles or macroscopic iron sulfides.
Clasp & Closure
Not applicable (Raw Mineral Specimen)
Chain & Links
Not applicable; the 'links' are natural geological boundaries between the quartz vein and the dark host rock (likely basalt or schist).
Craftsmanship Details
Natural geological formation through hydrothermal deposition; the sharp transitions between minerals indicate high-pressure formation surroundings.
Authentication Indicators
The 'gold' color appears too brassy/greenish and occupies cubic or planar structures, which is a red flag for iron pyrite. Real gold in quartz usually presents as buttery yellow, malleable wires, or hackly grains rather than large flat crystalline faces.
Origin & Maker
Naturally occurring; Mother Nature. Geologically common in hard-rock mining districts such as California (Mother Lode), Alaska, or Australia.
Era & Period
Geological time (typically Cenozoic or Mesozoic depending on locality indicator); Contemporary discovery.
Age Estimate
Millions of years old (geological formation); freshly harvested surface age.
Cultural Significance
Represents the 'Gold Rush' era of hard-rock mining where quartz crushers were used to extract wealth from deep within the earth.
Condition Notes
Raw/Natural. Displays fresh fractures and heavy oxidation. No evidence of chemical leaching or crushing has been performed yet.
Value Estimate
Primarily decorative/collector value as a 'prospecting piece.' Estimated at $30 - $75 USD. It does not have significant 'melt value' unless an assay proves high-grade microscopic gold content.
Care & Maintenance
Keep dry to prevent further oxidation of sulfide minerals; do not use acids as they may dissolve certain mineral inclusions; store on a stable surface due to weight.
Similar Items
Gold-bearing Arsenopyrite, Chalcopyrite in Quartz, or pure Specimen Gold (which would have much higher visible gold concentration).
Interesting Facts
The 'Iron Hat' or Gossan (the rusty top layer) was historically used by miners to find the massive gold deposits beneath the surface.