Auriferous Quartz Matrix with Ironstone Gossan
Raw Gold Ore (Lode Deposit) · Natural Native Gold specimens within quartz and hematite/limonite matrix
Purity: Likely 20K-24K naturally occurring; intrinsic gold content requires assay
Type
Raw Gold Ore (Lode Deposit)
Purity
Likely 20K-24K naturally occurring; intrinsic gold content requires assay
Gold Type
Natural Native Gold specimens within quartz and hematite/limonite matrix
Weight
350 - 550 grams (Total specimen weight; gold yield estimated at 0.5 - 5.0 grams)
Description
A rugged mineral specimen consisting of a heavily weathered ironstone 'gossan' and crystalline quartz. The dark, pitted surface indicates high iron content (hematite/limonite), which is a common host for primary gold deposits. Minute yellow metallic flecks are visible in the recesses, suggesting a 'lode' gold specimen where the gold is still encased in its parent rock.
Key Features
Vuggy quartz structure, high-density iron oxide matrix, presence of potential 'free-milling' gold, and natural crystalline growth.
Color & Finish
Deep ochre red to dark brown matrix; translucent white to smoky quartz crystals; metallic yellow trace highlights
Hallmarks & Stamps
None; purely geological specimen
Dimensions Estimate
90mm x 70mm x 45mm
Gemstones & Inlays
Natural Quartz crystals (six-sided prisms) and Iron Oxide crusting
Clasp & Closure
N/A - Raw geological specimen
Chain & Links
N/A - Raw geological specimen
Craftsmanship Details
N/A - Natural geological formation shaped by thermal hydrothermal fluids and subsequent tectonic uplift.
Authentication Indicators
Serrate/hackly yellow metallic inclusions; sectile property of visible gold; lack of cleavage in yellow flecks (separating it from pyrite/mica).
Origin & Maker
Natural geological formation; possibly artisanal mining site in Africa or South America
Era & Period
Geological Formation (likely Precambrian to Cenozoic depending on region)
Age Estimate
Millions of years (Formation); Recently excavated (Discovery)
Cultural Significance
Represents the primary source of human wealth; items like this have driven gold rushes and the development of entire nations and civilizations.
Condition Notes
Natural raw state; uncleaned with adhering soil. High structural integrity as a solid stone piece. (Grade: Raw Mineral Specimen)
Value Estimate
Collector value: $150 - $450; Melt value: dependent on crushing and chemical assay (likely $30 - $200 of gold content).
Care & Maintenance
Keep dry; clean only with soft brush and distilled water; avoid harsh acids like HF or Aqua Regia unless intended for gold recovery.
Similar Items
Iron Pyrite (Fool's Gold), Chalcopyrite, or Arsenopyrite (often confused with gold but harder and more brittle).
Interesting Facts
Most of the world's gold is actually microscopic (invisible gold) within such rocks; this specimen shows 'visible' gold which is significantly rarer and highly sought after by collectors.