Auriferous Quartz Matrix Gold Ore Specimen
Raw Gold (Ore/Matrix) · Native Yellow Gold in Mineral Matrix (likely Quartz and Sulfides/Pyrite)
Purity: Indeterminate; native gold typically ranges from 18K to 23K (75-98% purity). The gold is currently encapsulated in host rock (natural fineness).
Type
Raw Gold (Ore/Matrix)
Purity
Indeterminate; native gold typically ranges from 18K to 23K (75-98% purity). The gold is currently encapsulated in host rock (natural fineness).
Gold Type
Native Yellow Gold in Mineral Matrix (likely Quartz and Sulfides/Pyrite)
Weight
350 - 550 grams (Estimated total mass of the specimen). Gold content is likely a small percentage of total weight.
Description
This is a raw auriferous (gold-bearing) ore specimen consisting of native gold disseminated through a metamorphic matrix. The piece shows a rugged, unpolished surface where tiny grains of gold are visible amidst darker host minerals and lighter quartz veining. This is not bullion, but rather a geological collectable that represents the primary form of gold before it is refined into jewelry or bars.
Key Features
Heterogeneous distribution of metallic yellow grains; high-density contrast against rock; presence of oxidation indicating a near-surface deposit; fractured, non-crystalline matrix.
Color & Finish
Dull to metallic gold-yellow flecks against a charcoal-grey, silty, and brown oxidized host rock finish. Natural raw rocky texture.
Hallmarks & Stamps
None. As a raw geological specimen, it lacks man-made hallmarks or purity stamps.
Dimensions Estimate
90mm x 70mm x 45mm (approximate palm-sized specimen).
Gemstones & Inlays
Natural mineral inclusions including milky quartz, iron oxides (limonite/hematite), and potential sulfide minerals like pyrite or arsenopyrite.
Clasp & Closure
Not Applicable (Natural raw stone)
Chain & Links
Not Applicable (Natural jagged, fractured rock structure)
Craftsmanship Details
Nature-forged; geological crystalline growth and hydrothermal deposition within rock fissures.
Authentication Indicators
Sectility (gold can be cut or dented by a pin, unlike brittle pyrite), metallic luster consistency under different lighting, and specific gravity (the rock will feel heavier than common granite). RED FLAG: Many specimens like this are actually pyrite (Fool\'s Gold) or mica; laboratory assay is required for definitive valuation.
Origin & Maker
Natural Earth formation; specific locality unknown but consistent with hard-rock mining deposits found in regions like California, Australia, or West Africa.
Era & Period
Contemporary Geological Discovery (Natural mineral formation millions of years old).
Age Estimate
Geological age likely tens to hundreds of millions of years; recently extracted (Last 10-20 years).
Cultural Significance
Represents the historical foundation of 'Gold Rushes' globally. Such specimens were the primary target of hard-rock miners during the 19th-century rushes in Alaska and Australia.
Condition Notes
Natural raw state. Surface shows fresh fractures from mining. Presence of 'iron hat' (gossan) oxidation. Grade: Geological Specimen.
Value Estimate
Collector/specimen value: $50 - $150 USD. Melt value: negligible unless processed/refined, as the visible gold is likely thin leaf or micro-grains.
Care & Maintenance
Keep dry to prevent oxidation of associated sulfide minerals. Do not use ultrasonic cleaners or harsh chemicals which may dissolve the host rock. Dust with a soft brush.
Similar Items
Gold-bearing Pyrite (brittler, brassier), Chalcopyrite (softer, iridescent), Gold Nuggets (pure gold eroded from matrix), Electrum (natural gold/silver alloy).
Interesting Facts
Most of the world's gold is found in these subterranean veins. It takes approximately one ton of ore like this to produce just 5-10 grams of refined 24K gold on average.