Natural Native Gold in Quartz Matrix Specimen
Raw Gold Ore (Nugget in Matrix) · Natural Yellow Gold with trace silver/copper (electrum spectrum).
Purity: High Purity Native Gold, typically ranging from 20K to 23K (83% to 96% fine gold content).
Type
Raw Gold Ore (Nugget in Matrix)
Purity
High Purity Native Gold, typically ranging from 20K to 23K (83% to 96% fine gold content).
Gold Type
Natural Yellow Gold with trace silver/copper (electrum spectrum).
Weight
Total specimen weight estimated at 15-30g; gold content likely less than 1-2 grams of recoverable weight.
Description
A striking raw mineral specimen featuring visible native gold leaf and crystalline structures embedded within a fractured quartz matrix. Unlike refined gold, this piece showcases gold in its original geological context, exhibiting the 'lode gold' formation style where hydrothermal fluids deposited precious metal into quartz veins. The gold displays a high metallic luster and a brassy-yellow hue characteristic of high-purity natural specimens.
Key Features
Crystalline dendritic growth patterns, quartz-hosted lode structure, and lack of alluvial rounding (sharp edges).
Color & Finish
Deep, rich buttery yellow native luster with visible crystalline structure; matrix is milky white to translucent quartz with iron-oxide staining.
Hallmarks & Stamps
None. Natural geological specimens do not carry hallmarks or manufacturer stamps.
Dimensions Estimate
Specimen roughly 3cm x 2cm; gold inclusions range from sub-millimeter flakes to 5mm dendritic clusters.
Gemstones & Inlays
Host matrix consists of crystalline Quartz; secondary minerals include goethite or limonite (rust-colored staining).
Clasp & Closure
Not applicable; raw natural specimen.
Chain & Links
Not applicable; naturally occurring crystalline formation.
Craftsmanship Details
Nature-formed via hydrothermal deposition; no human craftsmanship involved in the gold formation itself.
Authentication Indicators
Sectility (gold will dent, not shatter), high metallic luster under low light, and diagnostic association with quartz and iron staining. Red flags for fakes include 'gold paint' or brass filings glued to rock.
Origin & Maker
Naturally occurring; common in orogenic gold deposits (e.g., California, Australia, or Canadian Shield).
Era & Period
Geological/Prehistoric formation (potentially millions of years old); contemporary discovery.
Age Estimate
Formation age unknown (geological time); recently extracted/unearthed.
Cultural Significance
Gold-in-quartz has been a symbol of the 'Prospector’s Dream' since the 19th-century gold rushes and is highly collected by mineralogists.
Condition Notes
Natural/Raw. The matrix shows jagged cleavage typical of quartz. Gold is surface-exposed. Structurally fragile if matrix has micro-fractures.
Value Estimate
Primarily valued as a mineral specimen. Market value $100-$300 depending on specimen aesthetics; significantly higher than local melt value.
Care & Maintenance
Do not use ultrasonic cleaners or harsh chemicals as they can dissolve the matrix or dislodge gold. Clean with distilled water and a soft brush only.
Similar Items
Pyrite (Fool's Gold) which is brittle and cubic; Chalcopyrite which has a more greenish-iridescent tarnish; Mica which is flaky and non-metallic.
Interesting Facts
Most gold used in jewelry was once part of such a formation; it takes roughly 1 ton of such ore on average to produce just 5-10 grams of gold.