Gold-Bearing Ironstone Gossan (Raw Gold Ore Sample)
Raw Gold / Mineral Specimen · Natural Native Gold; found as disseminated flakes or micro-inclusions within a host rock matrix.
Purity: Unknown; Variable fineness. Natural gold typically ranges from 70% to 95% (17K-23K), but this is unrefined ore, not solid gold metal.
Type
Raw Gold / Mineral Specimen
Purity
Unknown; Variable fineness. Natural gold typically ranges from 70% to 95% (17K-23K), but this is unrefined ore, not solid gold metal.
Gold Type
Natural Native Gold; found as disseminated flakes or micro-inclusions within a host rock matrix.
Weight
Estimated 25 to 70 grams based on size relative to fingers and probable density of iron-rich ore.
Description
This is a specimen of gold-bearing 'gossan' or iron-rich ore. The material is heavily oxidized, showing the classic 'rusty' appearance caused by the weathering of iron sulfides (like pyrite). Small, dull yellow patches suggest the presence of native gold trapped within the iron-oxide matrix. Unlike jewelry gold, this reflects the raw, unrefined state of the metal as it is found in the Earth's crust.
Key Features
Heavy iron mineralization, vuggy/porous texture typical of weathered rock, and dull metallic mustard-yellow inclusions that do not tarnish.
Color & Finish
Dull ochre, rusty brown, and burnt umber. The gold content appears as subtle mustard-yellow patches or minute metallic specks against a matte, earthy luster.
Hallmarks & Stamps
None. As a raw geological specimen, there are no refinery stamps or purity hallmarks.
Dimensions Estimate
Approximately 40mm x 35mm x 15mm. A handheld specimen roughly the size of a large walnut.
Gemstones & Inlays
None. The sample contains secondary iron minerals (limonite/hematite) and likely quartz or silicate minerals.
Clasp & Closure
Not applicable; raw mineral specimen.
Chain & Links
Not applicable; rough, uneven natural fracture surfaces and jagged edges.
Craftsmanship Details
Natural geological formation; no human craftsmanship present. Created via hydrothermal deposition and subsequent surface weathering.
Authentication Indicators
The yellow specks remain bright in shadow, unlike mica which disappears. No green 'verdigris' oxidation, indicating it is not brass. However, visual identification of ore is notoriously difficult without a streak test or assay.
Origin & Maker
Natural origin; Likely from a dry placer or hard-rock mining district (e.g., Western Australia, Nevada, or parts of Africa).
Era & Period
Geological/Modern discovery. Indicators suggest an oxidized zone of a hydrothermal vein system.
Age Estimate
Geological age: Millions of years. Collection date: Likely contemporary.
Cultural Significance
Historical indicator of a 'Mother Lode'. Specimens like this were the primary targets for prospectors during the 19th-century gold rushes.
Condition Notes
Fair (Raw Specification). Structurally crumbly or 'friable' due to oxidation. No signs of chemical treatment or smelting.
Value Estimate
Nominal collector value ($10-$50) as a specimen. The 'melt value' is likely low until the rock is crushed and chemically processed (assayed).
Care & Maintenance
Keep dry and store in a display box. Avoid cleaning with water as the iron minerals may further oxidize or crumble. Handle with gloves to prevent oils from affecting the surface.
Similar Items
Pyrite (Fool's Gold) in quartz, Chalcopyrite (copper ore), and Limonite staining on sandstone.
Interesting Facts
Most of the world's gold is actually microscopic within rocks like this. Large, shiny nuggets are extremely rare compared to this 'disseminated' form of gold.