igneous
Weathered granite pebble
Granite, a coarse-grained rock composed mainly of quartz, feldspar, and mica
AI-generated identification · may be incorrectPale gray-white with dark mica flecks and a granular, crystalline texture; minerals are typically Mohs 6–7 (mica about 2–3). Granite has no regular cleavage as a whole and usually has specific gravity around 2.6–2.7.
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Physical properties
Pale gray-white with dark mica flecks and a granular, crystalline texture; minerals are typically Mohs 6–7 (mica about 2–3). Granite has no regular cleavage as a whole and usually has specific gravity around 2.6–2.7.
Formation & geological history
Formed when silica-rich magma cooled slowly underground, allowing visible crystals to grow; granite bodies occur in ancient continental crust of many ages. The rounded shape is from weathering and transport, likely by water.
Uses & applications
Granite is widely used for building stone, countertops, paving, and aggregate; this small pebble is mainly suitable for collecting or landscaping.
Geological facts
The visible light and dark grains reflect different minerals crystallized together, rather than layers or fossils.
Field identification & locations
Identify granite by its interlocking pale quartz/feldspar grains and dark mica or amphibole flecks. It is common in beaches and riverbeds near granitic source rocks; the image alone cannot establish its precise source.
