Gold-Bearing Quartz Ore Specimen
Raw Gold (nugget, flake, or vein in host rock) · Natural Yellow Gold. Displays the classic warm, buttery hue characteristic of primary gold deposits.
Purity: High-purity free-milling gold, typically between 20K to 23K (83% - 97%). In its raw state, it is usually alloyed naturally with silver (electrum).
Type
Raw Gold (nugget, flake, or vein in host rock)
Purity
High-purity free-milling gold, typically between 20K to 23K (83% - 97%). In its raw state, it is usually alloyed naturally with silver (electrum).
Gold Type
Natural Yellow Gold. Displays the classic warm, buttery hue characteristic of primary gold deposits.
Weight
Indeterminate from image; however, specimens of this size usually range from 50 to 200 grams. The density involves both the host quartz (2.65 g/cm³) and the gold (19.3 g/cm³).
Description
An impressive primary deposit specimen featuring native gold running through a dark quartz matrix. The gold exhibits a high-luster, 'leaf' or 'vein' morphology, suggesting it was recovered directly from a hard-rock mine rather than a riverbed. The contrast between the heavy metallic gold and the fractured host rock makes it a highly desirable piece for geological collectors.
Key Features
Native gold stringers, hackly fracture patterns, visible sulfides, and high-purity color characteristic of primary lode gold.
Color & Finish
Deep yellow metallic luster set against a dull grey and white host matrix. The finish is 'as-found' or naturally weathered, showing a raw, unpolished crystalline or hackly surface.
Hallmarks & Stamps
None. Raw mineral specimens do not carry hallmarks as they are not manufactured items.
Dimensions Estimate
Macro-scale view; likely 4cm x 5cm x 3cm. The visible gold veins appear to be 1mm to 3mm in thickness.
Gemstones & Inlays
None. The gold is naturally embedded within a crystalline quartz and sulfide matrix.
Clasp & Closure
Not applicable; raw mineral specimen.
Chain & Links
Not applicable; raw mineral specimen.
Craftsmanship Details
N/A - Created by natural hydrothermal pressure and temperature rather than human manufacturing.
Authentication Indicators
Sectility (gold will dent, not shatter), specific gravity, and the distinctive irregular 'buttery' luster that synthetic 'fools gold' (pyrite) lacks.
Origin & Maker
Natural geological formation. Common origins include the Mother Lode (California), Klondike (Yukon), or regions like the Witwatersrand (South Africa). Likely a Lera Projects mining sample.
Era & Period
Geological/Pre-human. Formed during hydrothermal mineralization events potentially millions of years ago.
Age Estimate
Geological age; typically 50 million to 2 billion years depending on the deposit location.
Cultural Significance
Represents the 'Gold Rush' era of human history and the fundamental building block of all gold-based monetary systems and jewelry.
Condition Notes
Raw/Natural. The specimen shows jagged edges consistent with mining extraction. No signs of chemical leaching or tumbling.
Value Estimate
Specimen value. Usually carries a significant premium over the 'melt weight' of the gold content (often 2x to 5x spot price) due to its rarity as a display piece.
Care & Maintenance
Do not clean with harsh chemicals or ultrasonic cleaners. Use only distilled water and a soft brush. Keep in a stable environment to prevent the host matrix from crumbling.
Similar Items
Pyrite (Fools Gold) - which is brittle and brassy; Chalcopyrite - which is often iridescent; Gold-filled or plated specimens - which show uniform surface coating rather than deep veins.
Interesting Facts
Most gold is actually microscopic; specimens like this with visible 'coarse' gold are quite rare and represent a very small percentage of total gold mined globally.