Gold-Bearing Quartz Ore Specimen with Pyrite Inclusions
Raw Gold (Ore/Specimen) · Natural Yellow Gold in host rock (Quartz/Sulphide matrix).
Purity: Undetermined; potentially trace native gold content (typically 20K-22K in natural form) mixed with Iron Pyrite (Fool's gold).
Type
Raw Gold (Ore/Specimen)
Purity
Undetermined; potentially trace native gold content (typically 20K-22K in natural form) mixed with Iron Pyrite (Fool's gold).
Gold Type
Natural Yellow Gold in host rock (Quartz/Sulphide matrix).
Weight
80 - 120 grams (inclusive of host rock and gangue minerals).
Description
A rugged, unrefined mineral specimen featuring a dark grey sulphide-rich matrix and white quartz veins. It displays metallic yellowish inclusions that appear to be a mix of Iron Pyrite and potential trace native gold. The item represents gold in its primary geological context before refining.
Key Features
Angular fracture patterns, quartz-sulphide interface, and 'brassy' cubic crystal structures characteristic of iron pyrite.
Color & Finish
Dull brassy yellow metallic luster (indicative of pyrite) against matte grey host rock and white crystalline quartz.
Hallmarks & Stamps
None; natural geological formation.
Dimensions Estimate
Approx. 50mm x 35mm x 25mm (Hand-sized specimen).
Gemstones & Inlays
Natural Milky Quartz and possible Arsenopyrite or Chalcopyrite crystals.
Clasp & Closure
Not applicable (Raw mineral specimen).
Chain & Links
Not applicable (Rough fracture surfaces).
Craftsmanship Details
Natural mineralization; no human craftsmanship present.
Authentication Indicators
Red flags for 'Fool's gold': The metallic parts show a greenish-black streak (if tested on porcelain) and a brittle, cubic structure rather than the malleable, high-saturation yellow of native gold.
Origin & Maker
Natural geological origin; locality unknown (common in hydrothermal vein deposits).
Era & Period
Geological formation (Holocene to Pre-Cambrian depending on locality).
Age Estimate
Formation occurs over millions of years; recently extracted/found.
Cultural Significance
Specimens like this fueled the 'Gold Rush' eras in California and Australia, representing the 'Mother Lode' for prospectors.
Condition Notes
Raw, uncleaned condition with sharp edges and natural oxidation; grade is 'rough specimen'.
Value Estimate
Specimen value only: $5 - $25. Melt value is negligible as the metallic content appears to be primarily non-precious iron sulphides.
Care & Maintenance
Keep dry to prevent oxidation of iron sulphides (rusting); clean only with a soft brush and distilled water.
Similar Items
Pyrite clusters, Chalcopyrite (Peacock Ore), and high-grade Gold Quartz (which has much brighter, buttery-yellow webbing).
Interesting Facts
The 'Streak Test' is the fastest way to tell gold from pyrite; gold leaves a golden-yellow streak, while pyrite leaves a greenish-black residue.