igneous
Vein Quartz in Basalt
Silicate-veined volcanic rock
AI-generated identification · may be incorrectHardness of 6-7 on Mohs scale, grayish-black volcanic matrix with a prominent yellow-brown quartz or limonite vein, dull to vitreous luster.
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Physical properties
Hardness of 6-7 on Mohs scale, grayish-black volcanic matrix with a prominent yellow-brown quartz or limonite vein, dull to vitreous luster.
Formation & geological history
Formed through volcanic cooling followed by hydrothermal mineral deposition filling fractures millions of years ago.
Uses & applications
Primarily collected as a geological specimen; quartz veins sometimes host trace metallic ores.
Geological facts
Hydrothermal veins like this indicate secondary mineral precipitation from mineral-rich underground fluids.
Field identification & locations
Identify by the striking contrast between the dark host rock and the lighter fracture-filling vein; found in volcanic regions globally.
