Natural Gold-Bearing Quartz Host Rock
Raw Gold (Lode/Hard Rock) · Native Yellow Gold in Sulphide-rich Matrix.
Purity: Natural Purity (unrefined); typically 85%-95% pure gold (20K-22K intrinsic purity) mixed with silver alloys (electrum).
Type
Raw Gold (Lode/Hard Rock)
Purity
Natural Purity (unrefined); typically 85%-95% pure gold (20K-22K intrinsic purity) mixed with silver alloys (electrum).
Gold Type
Native Yellow Gold in Sulphide-rich Matrix.
Weight
Indeterminate from image; total specimen weight potentially several kilograms. Gold content visibility appears as micro-flecks.
Description
A raw, mineralized specimen of gold-bearing ore. The item features 'free-milling' gold visible as fine specks and grains within a complex host rock of weathered quartz and darker basaltic or slate materials. The surface shows recent moisture, highlighting the contrast between the non-reactive gold and the oxidized minerals.
Key Features
Sub-metallic luster of native gold, high-density inclusions, association with quartz and iron oxides, irregular dendritic or granular formation.
Color & Finish
Brilliant metallic yellow flecks set against a dark, wet, mineralized host rock with rusty iron-oxide staining and white quartz veins.
Hallmarks & Stamps
None. Natural geological specimens are identified by mineral association rather than man-made stamps.
Dimensions Estimate
Field specimen; visible area approximately 15-20cm across based on typical rock fracturing patterns.
Gemstones & Inlays
Natural Quartz (SiO2) crystalline matrix; possible associated Chalcopyrite or Pyrite (fools gold) inlays.
Clasp & Closure
Not applicable; raw mineral specimen.
Chain & Links
Not applicable; natural lode structure.
Craftsmanship Details
Natural mineralization; hydro-thermal deposition where gold-rich fluids were forced into rock fractures under immense heat and pressure.
Authentication Indicators
Sectile nature (gold is soft and does not shatter when poked), consistent color in shadow, association with white quartz and heavy oxidation.
Origin & Maker
Nature/Earth. Likely sourced from a hard-rock mining district (e.g., California Mother Lode, Klondike, or Australian Goldfields).
Era & Period
Geological time; likely millions of years old. No archaeological or decorative era applies.
Age Estimate
Eocene, Cretaceous, or older depending on the specific geological formation (millions of years).
Cultural Significance
Gold fever historically drove global migrations and 'Gold Rushes' that founded cities and shaped modern economies.
Condition Notes
Unprocessed/Raw. Weathered surface from exposure. Grade: Specimen Quality (Low-Grade Ore).
Value Estimate
Primarily determined by 'gold per ton' assay. Specimen value likely exceeds melt value for collectors, but total gold weight is currently low relative to rock mass.
Care & Maintenance
Do not use harsh acids which may dissolve the host rock. Clean with distilled water and a soft brush. Store as a dry mineral specimen.
Similar Items
Pyrite (Iron Sulfide) which is brittle and reflective, or Chalcopyrite, which often has a more iridescent or 'peacock' tarnish.
Interesting Facts
Most gold is mined from 'invisible' ore; seeing yellow metal in the rock implies a high-grade pocket that was the target of 19th-century 'hard rock' miners.