Natural Gold-Bearing Ore Specimen (Lode Gold in Quartz/Host Rock)
Raw Gold (Specimen in Matrix/Host Rock) · Native Yellow Gold (Natural Alloy)
Purity: Estimated 75% to 95% (18K to 23K equivalent for the visible native gold portions). Native gold occurs naturally with silver and copper alloys, rarely reaching 99.9% in raw form without refining.
Type
Raw Gold (Specimen in Matrix/Host Rock)
Purity
Estimated 75% to 95% (18K to 23K equivalent for the visible native gold portions). Native gold occurs naturally with silver and copper alloys, rarely reaching 99.9% in raw form without refining.
Gold Type
Native Yellow Gold (Natural Alloy)
Weight
Estimated total weight 15-30 grams. The proportion of gold-to-rock is visual only; specific gravity testing would be required to determine actual gold weight (fine gold content).
Description
This is a compelling specimen of lode gold, featuring visible native gold clusters embedded within a dark, mineralized host rock. Unlike alluvial gold which is rounded by water, this specimen shows the jagged, crystalline structure of gold as it was originally deposited by hydrothermal fluids in rock fissures. The contrast between the brilliant metallic yellow of the gold and the rugged, earthy matrix makes it a desirable piece for mineral collectors and geology enthusiasts.
Key Features
High visibility of native gold; crystalline structure; intact host rock matrix; evidence of hydrothermal deposition.
Color & Finish
Rich buttery yellow with metallic luster. The surface is naturally granular and crystalline, lacking the smooth finish of refined gold. The host rock is a dull grey-brown with matte finish and earthy patina.
Hallmarks & Stamps
None. As a raw geological specimen, it lacks man-made stamps or hallmarks.
Dimensions Estimate
Approximately 25mm x 20mm x 15mm (Small cabinet or hand specimen size).
Gemstones & Inlays
None, though the gold is embedded in a quartz and sulfide-rich mineral matrix which may contain micro-crystalline minerals.
Clasp & Closure
Not applicable (Raw mineral specimen).
Chain & Links
Not applicable; however, the gold displays a 'stringer' or dendritic formation where it has crystallized within the fissures of the host rock.
Craftsmanship Details
Nature-made; the 'craftsmanship' here is geological—the result of high-pressure fluid deposition over millennia, creating unique crystalline habits.
Authentication Indicators
Sectility (gold will indent rather than shatter if poked with a needle), high luster in low light, jagged edge structure inconsistent with 'fools gold' (pyrite), which usually forms perfect cubes or grains that shatter.
Origin & Maker
Natural Geological Deposit; Origin unknown but characteristic of lode gold mining regions (e.g., California, Australia, or South Africa).
Era & Period
Modern Discovery; Geologically Ancient (Likely millions of years old based on hydrothermal deposit formation).
Age Estimate
Geological formation: Archean to Cenozoic era. Collection date: Likely contemporary.
Cultural Significance
Raw gold specimens have been symbols of wealth and 'striking it rich' since the 19th-century gold rushes. They represent the rawest form of value before industrial processing.
Condition Notes
Raw/Natural condition. The gold appears securely attached to the matrix. Some surface dirt and oxidation of base metals in the rock are present. Grade: High-quality mineral specimen.
Value Estimate
Value is 'Specimen Value' which usually exceeds 'Melt Value.' While the gold content might be only a few grams ($150-$300), as a display specimen, it could fetch $400-$600 depending on the total gold visibility.
Care & Maintenance
Do not use ultrasonic cleaners as they can shatter the host rock. Clean with a soft brush and distilled water only. Store in a padded display box to prevent the gold from being scratched or the rock from crumbling.
Similar Items
Iron Pyrite (Fools Gold) - much harder and more brittle; Chalcopyrite - often has a greenish/iridescent tint; Gold-plated 'hot rocks' - man-made fakes usually lacking the depth of integration into the rock.
Interesting Facts
Most of the world's gold was delivered to Earth via asteroid impacts and then pushed toward the surface by volcanic and hydrothermal activity. This specimen represents 'Lode Gold,' the source material for the more commonly found 'Placer Gold' nuggets found in rivers.