mineral

Gold-bearing quartz (probable sulfide-bearing quartz)

Quartz, SiO₂, with possible pyrite or mica inclusions

AI-generated identification · may be incorrect

Hardness about 7 for quartz; pale gray to cream, granular and translucent, with brassy reflective grains. Quartz has a glassy luster and no cleavage; the metallic material is not clearly identifiable from the image.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Likely a hydrothermal vein specimen formed when mineral-rich fluids filled fractures in host rock; age depends on locality and may range from Paleozoic to Cenozoic. The visible metal-like flecks could be pyrite, chalcopyrite, mica, or native gold, but testing is required.

Uses & applications

Quartz specimens are collected and used in glass, electronics, and ceramics; pyrite-bearing pieces are mainly decorative or educational. Genuine gold-bearing quartz may have substantial value if gold content is confirmed.

Geological facts

Gold is malleable and leaves a yellow streak, whereas pyrite is brittle and leaves a dark greenish-black streak. A jeweler’s loupe, streak test, hardness test, and specific-gravity or assay test are needed for identification.

Field identification & locations

Common in gold districts worldwide, including California, Nevada, Australia, Canada, and South Africa. Do not rely on color alone: gold will not crumble under a steel point, while pyrite commonly fractures; professional assay is definitive.