igneous
Weathered granite pebble
Granite, composed mainly of quartz, feldspar, and mica
AI-generated identification · may be incorrectCoarse-grained, mottled light gray and white with dark mineral flecks; minerals are typically Mohs 6–7 (quartz) and 6 (feldspar). The rounded, irregular surface appears naturally weathered; exact identification is limited by the photo.
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Physical properties
Coarse-grained, mottled light gray and white with dark mineral flecks; minerals are typically Mohs 6–7 (quartz) and 6 (feldspar). The rounded, irregular surface appears naturally weathered; exact identification is limited by the photo.
Formation & geological history
Granite forms when silica-rich magma cools slowly underground, allowing visible crystals to grow. Granite occurs in rocks of many geological ages, from Archean to recent intrusions.
Uses & applications
Granite is widely used as building and paving stone, countertops, monuments, and decorative aggregate; this small pebble is mainly suitable for collecting.
Geological facts
The pale grains are likely feldspar and quartz, while dark specks may be biotite or other accessory minerals.
Field identification & locations
A speckled mix of interlocking crystals and hardness distinguish granite; it is common in continental crust and stream or beach gravels. A hand lens can help confirm visible quartz and feldspar.
