igneous
Weathered granite (probable)
Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica
AI-generated identification · may be incorrectRough, rounded tan-gray rock with visible light and dark mineral grains. Typical granite has Mohs hardness 6–7, vitreous-to-dull luster, interlocking crystals, no cleavage as a whole, and specific gravity around 2.6–2.7.
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Physical properties
Rough, rounded tan-gray rock with visible light and dark mineral grains. Typical granite has Mohs hardness 6–7, vitreous-to-dull luster, interlocking crystals, no cleavage as a whole, and specific gravity around 2.6–2.7.
Formation & geological history
Formed by slow cooling of silica-rich magma deep within Earth’s crust; granite bodies occur across many geological ages. Surface weathering has rounded and stained this specimen.
Uses & applications
Granite is widely used as building and paving stone, countertops, monuments, and aggregate; this unpolished piece is mainly suitable for collecting or decoration.
Geological facts
Its pale minerals are likely quartz and feldspar, while dark patches may be biotite or amphibole; the photo alone cannot confirm the exact mineral proportions.
Field identification & locations
The coarse, interlocking mixture of pale and dark grains supports a granite identification, though the image is not diagnostic. Granite is common on continents worldwide; a fresh broken surface and mineral tests can help distinguish it from similar rocks.
