igneous
Weathered granite fragment
Granite, a coarse-grained felsic intrusive igneous rock; likely quartz, feldspar, and mica
AI-generated identification · may be incorrectPale pink-tan with visible light and dark mineral grains and a rough, granular surface; granite minerals typically have Mohs hardness of 6–7 (quartz) and 6 (feldspar), with no overall cleavage. The fragment’s small size and weathering make exact identification uncertain.
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Physical properties
Pale pink-tan with visible light and dark mineral grains and a rough, granular surface; granite minerals typically have Mohs hardness of 6–7 (quartz) and 6 (feldspar), with no overall cleavage. The fragment’s small size and weathering make exact identification uncertain.
Formation & geological history
Granite forms when silica-rich magma cools slowly underground, allowing crystals to grow; it occurs across many geological ages. This piece may have weathered from bedrock and been transported into the gravel.
Uses & applications
Granite is widely used for building stone, paving, countertops, and aggregate; this small, weathered fragment has little commercial value.
Geological facts
Granite is a rock rather than a single mineral, and its exact color and texture vary with the proportions of quartz, feldspar, and mica.
Field identification & locations
Look for interlocking, visible grains and a mix of pale quartz/feldspar with darker minerals; this sample could also be another feldspar-rich rock, so a fresh surface would help confirm it. Common worldwide in continental crust and gravel deposits.
