igneous
Tumbled pink granite
Granite, mainly quartz, feldspar, and mica
AI-generated identification · may be incorrectCoarse-grained, pale pink-and-white stone with black mica or amphibole; vitreous to dull luster, interlocking crystals, no regular cleavage as a rock, Mohs hardness about 6–7, and specific gravity roughly 2.63–2.75.
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Physical properties
Coarse-grained, pale pink-and-white stone with black mica or amphibole; vitreous to dull luster, interlocking crystals, no regular cleavage as a rock, Mohs hardness about 6–7, and specific gravity roughly 2.63–2.75.
Formation & geological history
An intrusive igneous rock formed when silica-rich magma cooled slowly deep underground, generally during Precambrian or younger continental crust formation. The rounded shape appears human-tumbled or naturally water-worn.
Uses & applications
Used for countertops, monuments, building stone, aggregate, landscaping, and inexpensive decorative specimens. This small tumbled piece has minimal jewelry or collector value.
Geological facts
Pink color typically comes from potassium feldspar, while gray translucent grains are quartz and dark flecks are biotite or hornblende. Granite’s visible crystals indicate slow cooling rather than volcanic eruption.
Field identification & locations
Identify it by its speckled, interlocking pink, white, gray, and black grains; it will not fizz with dilute hydrochloric acid and is harder than glass in many areas. Common worldwide, especially in continental shields and mountain batholiths.
