igneous
Pink feldspar-rich granite or pegmatite
Potassium-feldspar granite; chiefly microcline/orthoclase (KAlSi₃O₈), quartz, and minor mica
AI-generated identification · may be incorrectCoarse, massive texture with salmon-pink feldspar and white-gray quartz; vitreous to dull luster, no obvious cleavage at specimen scale, and estimated Mohs hardness 6–7. Specific gravity is approximately 2.6–2.7.
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Physical properties
Coarse, massive texture with salmon-pink feldspar and white-gray quartz; vitreous to dull luster, no obvious cleavage at specimen scale, and estimated Mohs hardness 6–7. Specific gravity is approximately 2.6–2.7.
Formation & geological history
Formed when silica-rich magma cooled slowly underground, allowing large crystals to develop; likely Precambrian to younger plutonic material, though age cannot be determined from the photograph.
Uses & applications
Used as dimension stone, countertops, monuments, aggregate, and landscaping rock; attractive pink pieces may be collected or polished.
Geological facts
The salmon color typically comes from potassium feldspar, while cloudy white areas are quartz or altered feldspar. The rough surface and coarse interlocking grains distinguish it from most sedimentary rocks.
Field identification & locations
Common in continental mountain belts and shield regions worldwide, including India, Brazil, Scandinavia, and the United States. A fresh broken surface should show interlocking pink feldspar, translucent-gray quartz, and possibly black mica; acid testing is generally nonreactive.
