DescriptionGold-quartz hydrothermal vein in matrix (Amador County, California, USA) (17161938811).jpg
Gold-quartz hydrothermal vein in matrix from California, USA. (public display, Leadville Mining Museum, Leadville, Colorado, USA)
This is a gold ore sample from California's Mother Lode Gold Belt. The whitish-gray material is quartz (SiO2 - silicon dioxide). The metallic yellowish material is native gold (Au). The blackish-colored material is the vein-hosting rock.
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