igneous
Likely feldspar-rich granite or pegmatite fragment
Granite/pegmatite; chiefly quartz and feldspar, possibly mica
AI-generated identification · may be incorrectBrown, coarse and irregularly crystalline with a dull-to-glassy luster. Typical hardness is about 6–7 Mohs; exact mineral proportions and cleavage cannot be determined from the photo.
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Physical properties
Brown, coarse and irregularly crystalline with a dull-to-glassy luster. Typical hardness is about 6–7 Mohs; exact mineral proportions and cleavage cannot be determined from the photo.
Formation & geological history
Likely crystallized slowly from silica-rich magma, allowing visible grains to grow. Such rocks commonly formed in continental crust over a wide range of geological ages.
Uses & applications
Granite is used as building and paving stone, countertops, aggregate, and decorative material; small fragments are mainly collected or studied as specimens.
Geological facts
The image does not show enough detail for a reliable identification; several coarse-grained rocks can look similar when weathered.
Field identification & locations
Look for interlocking grains and distinguishable quartz, feldspar, and mica; a fresh surface and closer view would improve identification. Granite and pegmatite occur widely in continental regions.
