igneous
Pink granite pebble
Granite, a coarse-grained felsic intrusive igneous rock, chiefly quartz, feldspar, and mica
AI-generated identification · may be incorrectPinkish-red, speckled, massive and granular with no obvious cleavage; constituent minerals are typically Mohs 6–7 (feldspar about 6, quartz 7). The small, rounded specimen’s luster and crystal structure are difficult to assess from the image.
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Physical properties
Pinkish-red, speckled, massive and granular with no obvious cleavage; constituent minerals are typically Mohs 6–7 (feldspar about 6, quartz 7). The small, rounded specimen’s luster and crystal structure are difficult to assess from the image.
Formation & geological history
Granite forms when silica-rich magma cools slowly underground, allowing crystals to grow. Such rocks occur in ancient continental crust of many geological ages; this pebble’s age and source cannot be determined from the photo.
Uses & applications
Granite is widely used for building stone, paving, countertops, monuments, and landscaping; this pebble is mainly suitable for collecting or decoration.
Geological facts
Its pink color commonly comes from potassium feldspar, while quartz appears gray or glassy and mica may appear dark and flaky.
Field identification & locations
The pink color and scattered light and dark grains are consistent with granite, but the image does not resolve individual minerals well enough for certain identification. Rounded edges suggest transport by water or weathering; granite is common in continental mountain belts and glacial deposits.
