mineral
Likely milky quartz pebble
Quartz (SiO₂), possibly iron-stained
AI-generated identification · may be incorrectCreamy white to tan, opaque and rounded, with a dull to slightly vitreous luster; quartz has Mohs hardness 7 and a trigonal crystal structure, with no cleavage and conchoidal fracture. The image alone cannot confirm the identification.
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Physical properties
Creamy white to tan, opaque and rounded, with a dull to slightly vitreous luster; quartz has Mohs hardness 7 and a trigonal crystal structure, with no cleavage and conchoidal fracture. The image alone cannot confirm the identification.
Formation & geological history
Likely a fragment of quartz released by weathering from quartz-rich rock and rounded during transport by water. Quartz forms in many geological settings and occurs in rocks of widely varying ages.
Uses & applications
Quartz is used in glass, electronics, construction aggregate, and ornament; this small pebble is mainly of casual collecting value.
Geological facts
Quartz is one of Earth’s most abundant minerals. Tan coloring commonly results from iron-oxide staining or surface weathering.
Field identification & locations
Look for hardness sufficient to scratch glass, lack of cleavage, and a glassy fracture; a streak or scratch test can help distinguish it from softer lookalikes. Quartz is widespread worldwide.
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Pegmatite with Tourmaline and Quartz
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Epidote
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Gypsum (variety Selenite or Alabaster)
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Mineral