igneous
Weathered pink-and-white quartz-rich pebble
Likely quartz–feldspar-rich granite or pegmatite; exact identification is uncertain from the photograph
AI-generated identification · may be incorrectPale pink, white, and tan mottling with a dull, weathered surface; likely dominated by quartz and feldspar. Quartz has Mohs hardness 7 and vitreous luster; the pebble’s grain size and cleavage are not clearly visible.
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Physical properties
Pale pink, white, and tan mottling with a dull, weathered surface; likely dominated by quartz and feldspar. Quartz has Mohs hardness 7 and vitreous luster; the pebble’s grain size and cleavage are not clearly visible.
Formation & geological history
If granite or pegmatite, it formed as silica-rich magma cooled underground, then was exposed and rounded by weathering and transport. Its age cannot be determined from appearance alone.
Uses & applications
Primarily a hand specimen or landscaping pebble; comparable quartz- and feldspar-rich rocks are also used as building and decorative stone.
Geological facts
The rounded shape indicates abrasion during transport or prolonged weathering, while pink patches commonly reflect potassium feldspar.
Field identification & locations
Look for interlocking quartz and feldspar grains and test hardness on a fresh surface; a hand lens may help distinguish granite from quartz-rich vein material. Such rocks are widespread, but the specific source is unknown.
