mineral
Tumbled milky quartz (likely quartz/chalcedony)
Quartz, SiO₂; possibly microcrystalline chalcedony
AI-generated identification · may be incorrectPale cream to honey color, translucent edges, vitreous to waxy luster, irregular rounded shape, and no obvious cleavage. Quartz has Mohs hardness 7 and specific gravity about 2.65; the apparent texture may reflect weathering or surface coating.
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Physical properties
Pale cream to honey color, translucent edges, vitreous to waxy luster, irregular rounded shape, and no obvious cleavage. Quartz has Mohs hardness 7 and specific gravity about 2.65; the apparent texture may reflect weathering or surface coating.
Formation & geological history
Formed when silica-rich fluids crystallized in fractures, cavities, or sedimentary environments; quartz occurs from Precambrian to modern geological settings. This piece appears naturally rounded or lightly tumbled/polished.
Uses & applications
Common quartz is used in glass, ceramics, abrasives, electronics, and construction aggregate; attractive pieces are sold as inexpensive lapidary or décor specimens.
Geological facts
Its cream coloration may result from iron staining, inclusions, or alteration. Chalcedony is chemically identical to quartz but consists of microscopic intergrown fibers.
Field identification & locations
Test with a steel knife: genuine quartz should resist scratching, while glassy imitations may scratch more easily; a streak test should be white. Common worldwide, especially in hydrothermal veins, quartz-rich gravels, and geodes.
