mineral
Tumbled quartz-rich pebble, possibly milky quartz or quartzite
Quartz (SiO₂), potentially quartzite if metamorphically recrystallized
AI-generated identification · may be incorrectPale pinkish-white, opaque to translucent, with a glassy-to-waxy luster and irregular granular texture. Quartz has Mohs hardness 7, no cleavage, conchoidal fracture, and specific gravity about 2.65; the rounded shape indicates tumbling or stream wear.
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Physical properties
Pale pinkish-white, opaque to translucent, with a glassy-to-waxy luster and irregular granular texture. Quartz has Mohs hardness 7, no cleavage, conchoidal fracture, and specific gravity about 2.65; the rounded shape indicates tumbling or stream wear.
Formation & geological history
Likely formed from silica-rich veins or quartz-rich metamorphic rock; the pink coloration may reflect iron staining or minor feldspar. Exact geological age and locality cannot be determined from the photograph.
Uses & applications
Used as a decorative stone, landscaping pebble, craft material, and inexpensive lapidary specimen; generally little jewelry value unless unusually clear or attractive.
Geological facts
Quartz is one of Earth’s most abundant minerals and is a major component of granite, sandstone, and many metamorphic rocks.
Field identification & locations
Identify it by its hardness— it should scratch ordinary glass—and lack of cleavage; it is not likely to be calcite, which is much softer. Common worldwide, especially in quartz veins and river gravels.
