mineral

Gold-bearing quartz or ironstone fragment

Quartz (SiO₂) with possible native gold and iron oxides

AI-generated identification · may be incorrect

Dark brown-gray, earthy to submetallic material with yellow-gold patches; likely quartz-rich and iron-stained. Quartz has Mohs hardness 7, vitreous luster, no cleavage, and specific gravity 2.65; visible yellow material may be gold, pyrite, or staining, which cannot be confirmed from the image.

Identified August 17, 2026More mineral →

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Physical properties

Formation & geological history

Likely a hydrothermal vein fragment formed when mineral-rich fluids deposited quartz and sulfides or native gold in fractures, later weathered near the surface. Age depends on its source locality and cannot be determined visually.

Uses & applications

Gold-bearing specimens may have collector value or be processed as ore; ordinary ironstone/quartz has little industrial value as a small specimen.

Geological facts

Native gold is malleable and leaves a yellow streak, whereas pyrite is brittle and commonly leaves a dark greenish-black streak. The image alone cannot establish that the yellow areas are gold.

Field identification & locations

Commonly found in quartz veins and oxidized lode deposits; test with a streak plate, hardness, magnetism, and specific gravity, or obtain an assay. Do not scratch it with metal if preservation matters.