Auriferous Quartz Matrix Specimen
Raw Gold Ore (Lode Gold in Quartz) · Natural Yellow Placer/Lode Gold Alloyed with Silver
Purity: Likely 18K to 23K (75-97% pure) within the visible grains; overall item is a low-purity bulk ore
Type
Raw Gold Ore (Lode Gold in Quartz)
Purity
Likely 18K to 23K (75-97% pure) within the visible grains; overall item is a low-purity bulk ore
Gold Type
Natural Yellow Placer/Lode Gold Alloyed with Silver
Weight
Estimated 800 - 1,200 grams based on size and typical density of quartz-sulfide matrix
Description
A substantial lode gold specimen featuring fine metallic gold mineralization dispersed throughout a heavy quartz matrix. The rock shows characteristic 'rusty' iron-oxide staining, which often indicates the decomposition of gold-bearing sulfides. The piece is a classic representation of 'hard rock' gold before it is liberated by erosion into nuggets.
Key Features
Crystalline quartz structure with vugs, visible ochre oxidation, and disseminated metallic flecks
Color & Finish
Dull brassy-yellow metallic inclusions against a buff, cream, and oxidised iron-red/brown matte quartz finish
Hallmarks & Stamps
None; natural geological specimen devoid of man-made markings
Dimensions Estimate
Approximately 7.5 inches (19 cm) in length and 3 inches (7.6 cm) in height based on the provided scale
Gemstones & Inlays
Natural crystalline quartz, iron oxides (limonite/hematite), and potential pyrite or chalcopyrite inclusions
Clasp & Closure
Not applicable; raw mineral specimen
Chain & Links
Not applicable; features a jagged, crystalline, and fractured rock matrix
Craftsmanship Details
Natural hydrothermal formation; no human craftsmanship present
Authentication Indicators
Irregular jagged gold shape (malleable vs brittle pyrite), host rock consistent with auriferous veins, lack of modern tooling marks
Origin & Maker
Natural terrestrial origin; typically from regions like the Mother Lode (California), Alaska, or Australia
Era & Period
Geological/Prehistoric; likely formed millions of years ago during hydrothermal mineralization
Age Estimate
Specimen is millions of years old; recovery likely modern (last 50 years)
Cultural Significance
Represents the 'Gold Rush' era of mining history where lode deposits were the ultimate prize for prospectors
Condition Notes
Fair to Good; shows typical raw extraction fractures, heavy oxidation, and significant host-rock-to-gold ratio
Value Estimate
Highly variable; primarily specimen value ($200-$600) rather than melt value, as the gold content requires chemical extraction
Care & Maintenance
Keep dry; clean only with distilled water and a soft brush. Avoid acids which may dissolve the matrix or change the color of the gold flecks.
Similar Items
Gold Nugget (free-standing), Iron Pyrite ('Fool's Gold') in Matrix, or Auriferous Pyrite Ore
Interesting Facts
Most gold found in quartz is microscopic; visible gold specimens like this are highly prized by mineral collectors even if the 'crush' value is lower than it looks.