Natural Gold-Bearing Ore with Free-Milling Gold
Raw Gold Ore (Lode Gold) · Yellow Gold (Native Element)
Purity: Geological variable; visible gold typically ranges from 18K to 23K (75-96% fineness) in its natural state, though the total specimen purity depends on the gold-to-matrix ratio.
Type
Raw Gold Ore (Lode Gold)
Purity
Geological variable; visible gold typically ranges from 18K to 23K (75-96% fineness) in its natural state, though the total specimen purity depends on the gold-to-matrix ratio.
Gold Type
Yellow Gold (Native Element)
Weight
Undetermined without physical scale; the specimen appears to be several hundred grams based on visible fracturing and density of the silicate matrix.
Description
This is a high-grade lode gold specimen featuring visible 'free gold' disseminated within a mineralized matrix. The gold exhibits a classic irregular, wire-like growth pattern typical of hydrothermal vein deposits. The contrast between the brilliant yellow gold and the dark grey mineralized host rock suggests a complex mineralization history, making it a desirable specimen for mineral collectors and geologists alike.
Key Features
Visible free gold, dark sulphide-rich matrix, jagged fracture surfaces, and metallic luster.
Color & Finish
Raw metallic gold yellow with a high-luster surface against a dark, metallic grey and white quartz-rich host rock. Surface is naturally jagged and crystalline.
Hallmarks & Stamps
None; as a raw geological specimen, it lacks man-made hallmarks. Identification relies on mineralogical properties.
Dimensions Estimate
Macro view suggests a specimen approximately 5cm to 8cm in width, though lacking a scale bar for precision.
Gemstones & Inlays
None; however, the host matrix consists of various minerals including quartz (white), possibly arsenopyrite or galena (dark grey), and iron oxides.
Clasp & Closure
Not applicable (Raw mineral specimen).
Chain & Links
Not applicable (Raw mineral specimen).
Craftsmanship Details
Natural mineralization; the gold has precipitated into voids within the host rock through high-pressure hydrothermal fluids.
Authentication Indicators
The irregular, non-geometric morphology of the yellow inclusions is consistent with native gold; lack of cleavage in the yellow areas distinguishes it from pyrite (Fool's Gold); color remains consistent under varying light angles.
Origin & Maker
Natural geological formation; possibly sourced from a hard-rock mining district such as the Carlin Trend (USA), Witwatersrand (South Africa), or Western Australian goldfields.
Era & Period
Geological (Pre-human extraction); typical of ancient hydrothermal vein deposits.
Age Estimate
Millions of years old, formed during hydrothermal mineralization events.
Cultural Significance
Gold ore represents the primary source of human wealth and industrial standard; it is the physical manifestation of 'striking it rich' in historical gold rushes.
Condition Notes
Raw/Unprocessed. The specimen displays natural weathered edges and internal fractures consistent with hard-rock extraction via blasting or hammering.
Value Estimate
Value is determined by the troy ounce gold content plus a 'specimen premium' which can be 1.5x to 3x the melt value for aesthetic mineral samples.
Care & Maintenance
Keep dry to prevent oxidation of associated sulphide minerals (like pyrite or arsenopyrite) which can lead to 'sulfuric decay'. Clean only with distilled water and soft brushes if necessary.
Similar Items
Pyrite (Fool's Gold) which has cubic crystals, and Chalcopyrite which has a more greenish-yellow iridescent tint.
Interesting Facts
Most of the world's gold is actually microscopic (invisible gold); finding visible 'specimen' gold like this in situ is relatively rare and highly prized by miners.