mineral
Likely gold-bearing quartz vein rock
Quartz (SiO₂), possibly with native gold and iron sulfides/oxides
AI-generated identification · may be incorrectIrregular, pale gray to honey-colored quartz with granular metallic-looking inclusions; quartz hardness 7, vitreous luster, no cleavage, hexagonal crystal structure, specific gravity 2.65. The brassy grains may instead be pyrite or chalcopyrite; gold cannot be confirmed visually.
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Physical properties
Irregular, pale gray to honey-colored quartz with granular metallic-looking inclusions; quartz hardness 7, vitreous luster, no cleavage, hexagonal crystal structure, specific gravity 2.65. The brassy grains may instead be pyrite or chalcopyrite; gold cannot be confirmed visually.
Formation & geological history
Likely formed in a hydrothermal vein, where silica-rich fluids filled fractures and deposited quartz plus sulfide minerals; age depends on the host deposit and cannot be determined from the image.
Uses & applications
Quartz vein material is mainly a collector specimen; gold-bearing ore may be mined for precious metal, while quartz has industrial uses in glass, ceramics, and electronics.
Geological facts
Native gold is soft, malleable, and remains bright yellow, whereas pyrite is brittle and commonly tarnishes. A streak, hardness, density, and professional assay are needed for identification.
Field identification & locations
Common in hydrothermal districts worldwide, including Nevada, California, Australia, and Canada. Gold is malleable and leaves a yellow streak; pyrite typically scratches glass but crumbles under force and leaves a dark streak.
