Natural Gold-Bearing Ores Specimen with Pyrite Inclusions
Raw Gold Ore (Matrix Mineral) · Native gold in quartz/sulfide matrix
Purity: Indeterminate; requires assay. Typically consists of trace gold (90-98% pure if refined) embedded in host rock (~0.01-1% by volume).
Type
Raw Gold Ore (Matrix Mineral)
Purity
Indeterminate; requires assay. Typically consists of trace gold (90-98% pure if refined) embedded in host rock (~0.01-1% by volume).
Gold Type
Native gold in quartz/sulfide matrix
Weight
Undetermined (Total specimen weight includes non-metallic matrix rock)
Description
This specimen features a complex matrix of iron-rich host rock (gossan) with visible metallic inclusions. The metallic grains show a distinct brassy luster and crystalline habit. In its raw form, this represents the primary source of gold before extraction, where the precious metal is encased in quartz or sulfide minerals.
Key Features
Crystalline structure, metallic luster, iron-oxide staining, and heterogeneous mineral distribution.
Color & Finish
Lustrous metallic brassy-yellow inclusions against a reddish-brown iron-stained gossan and white crystalline quartz matrix.
Hallmarks & Stamps
None; natural geological formation.
Dimensions Estimate
Macro close-up; specimen appears to be approximately 3-5 cm in length based on grain texture.
Gemstones & Inlays
Possible pyrite (Fool's Gold) crystals or chalcopyrite; no formal gemstones/inlays.
Clasp & Closure
Not applicable (Raw mineral specimen)
Chain & Links
Not applicable; crystalline structure and jagged fracture surfaces.
Craftsmanship Details
Naturally formed through hydrothermal deposition; no human craftsmanship present.
Authentication Indicators
Warning: The sharp geometric edges and greenish-black tarnish in recessed areas suggests Pyrite or Chalcopyrite rather than native gold. Native gold is more malleable and retains a rich yellow hue regardless of lighting.
Origin & Maker
Natural geological origin; possibly from a lode deposit or hydrothermal vein.
Era & Period
Geological formation; millions of years old.
Age Estimate
Pre-Cambrian to Cenozoic depending on original local geology.
Cultural Significance
Represents the 'Gold Rush' era of prospecting and the geological foundation of wealth.
Condition Notes
Raw / Unprocessed; contains natural weathering and jagged fractures consistent with mining extraction.
Value Estimate
Primarily specimen value for collectors ($20-$100) unless assay proves high gold concentration. Gold content value is likely negligible without refinement.
Care & Maintenance
Keep dry to prevent oxidation of sulfide minerals; handle with care as matrix rock may be brittle or crumbly.
Similar Items
Iron Pyrite (Fool's Gold), Chalcopyrite (Copper Ore), or Native Copper.
Interesting Facts
Most 'gold' seen in rocks is actually iron pyrite. Gold is one of the few elements that can be found in its 'native' form, but it usually requires industrial crushing and chemical leaching to be visible.