Auriferous Quartz and Sulfide Ore Mineral Specimen
Raw Gold Ore (Mineral Specimen) · Natural Native Gold in Host Rock
Purity: Low estimated fineness; gold is likely microscopic or disseminated (refractory gold) within the host matrix. Natural gold typically ranges from 18K to 23K, but the bulk purity of the stone is negligible.
Type
Raw Gold Ore (Mineral Specimen)
Purity
Low estimated fineness; gold is likely microscopic or disseminated (refractory gold) within the host matrix. Natural gold typically ranges from 18K to 23K, but the bulk purity of the stone is negligible.
Gold Type
Natural Native Gold in Host Rock
Weight
40 to 60 grams (based on hand scale and rock density)
Description
A rugged specimen of gold-bearing ore featuring a dark, dense matrix. The specimen shows wet surfaces suggesting recent recovery from a creek or wash. It contains metallic crystalline flecks that appear to be sulfides or native gold trapped within the host rock, representing the 'lode' source from which gold nuggets are eventually weathered.
Key Features
Heterogeneous mineral composition, dark silicate or iron-stained matrix, metallic inclusions with cubic and irregular habits.
Color & Finish
Metallic brassy to pale yellow inclusions within a dark, wet, charcoal-to-black host rock with matte and reflective surfaces.
Hallmarks & Stamps
None; natural geological formation.
Dimensions Estimate
Length: 45mm, Width: 25mm, Thickness: 20mm
Gemstones & Inlays
None; contains secondary minerals possibly including Pyrite (Fool's Gold), Chalcopyrite, or Arsenopyrite.
Clasp & Closure
Not applicable; raw mineral specimen.
Chain & Links
Not applicable; jagged, irregular crystalline and rock fracture surfaces.
Craftsmanship Details
N/A; produced by hydrothermal geological activity involving high-pressure fluids and mineral precipitation in rock fissures.
Authentication Indicators
Absence of manufacturing marks; irregular crystalline structure; high density for its size; metallic luster consistent with sulfides or native gold.
Origin & Maker
Natural occurrence; likely sourced from a riverbed (placer-adjacent) or hard-rock lode deposit.
Era & Period
Geological time; likely millions of years old (Precambrian to Cenozoic depending on location).
Age Estimate
Geological formation: millions of years; Recovery date: Recent.
Cultural Significance
Represents the historical 'Gold Rush' dream; the raw material of global currency and jewelry before human intervention.
Condition Notes
Natural/Raw. Surface is unworked and shows geological weathering and recent saturation. Structure is solid but brittle.
Value Estimate
$5 - $50 as a mineral specimen; melt value is negligible unless crushed and assayed; value depends on the 'eye appeal' to a mineral collector.
Care & Maintenance
Keep dry to prevent oxidation of sulfide minerals; handle with gloves to prevent skin oils from dulling the surface; store in a cushioned display case.
Similar Items
Pyrite specimens (lighter, more brittle), Micaceous Schist (flakier), High-grade Gold Quartz (typically white matrix).
Interesting Facts
Most gold is found in tiny particles inside rocks like this; it often requires crushing and chemical processing to extract. Visible gold in such a dark matrix is often a sign of high-grade ore.