igneous
Granite-like rock
Likely weathered granite or granitic pegmatite; chiefly quartz, feldspar, and minor mica
AI-generated identification · may be incorrectLight gray, coarse crystalline, and dull to slightly glassy; typical minerals are Mohs 6–7 (quartz) and 6–6.5 (feldspar), with no obvious cleavage on the fragment. Specific gravity is approximately 2.6–2.7.
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Physical properties
Light gray, coarse crystalline, and dull to slightly glassy; typical minerals are Mohs 6–7 (quartz) and 6–6.5 (feldspar), with no obvious cleavage on the fragment. Specific gravity is approximately 2.6–2.7.
Formation & geological history
Formed by slow cooling of silica-rich magma deep in the crust, producing interlocking crystals; its exact geological age cannot be determined from the photograph and may range from Precambrian to younger.
Uses & applications
Granite is widely used for building stone, countertops, monuments, aggregate, and ornamental pieces; this small irregular fragment has little commercial value.
Geological facts
The pale color and speckled texture are consistent with abundant feldspar and quartz, though the image is insufficient for a precise identification.
Field identification & locations
Common in continental crust and exposed at many mountain belts and quarry sites worldwide. A fresh surface, hand lens, and acid test can help: quartz is glassy and does not fizz, while calcite-rich lookalikes fizz weakly in dilute acid.
