igneous
Polished pink granite (likely granite pebble)
Granite, mainly quartz, alkali feldspar, plagioclase, and minor biotite/hornblende
AI-generated identification · may be incorrectCoarse crystalline texture with pale pink feldspar, white quartz, and dark gray-brown accessory minerals; vitreous quartz and feldspar luster, no obvious cleavage on the rounded surface. Typical hardness is about 6–7 Mohs and specific gravity 2.63–2.75.
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Physical properties
Coarse crystalline texture with pale pink feldspar, white quartz, and dark gray-brown accessory minerals; vitreous quartz and feldspar luster, no obvious cleavage on the rounded surface. Typical hardness is about 6–7 Mohs and specific gravity 2.63–2.75.
Formation & geological history
Slow cooling of silica-rich magma deep in the continental crust, producing interlocking crystals; most granite formed during Precambrian–Mesozoic plutonic episodes. This specimen has been naturally rounded and likely polished or tumbled.
Uses & applications
Used as dimension stone, countertops, tiles, monuments, aggregate, and decorative or lapidary material. Small polished pieces are inexpensive collectibles.
Geological facts
The pink color generally comes from potassium feldspar, while translucent white-gray areas are quartz. The precise variety cannot be confirmed without a fresh surface or mineral tests.
Field identification & locations
Identify by its visible interlocking grains and pink feldspar rather than banding or layering; a glassy streak or hardness near 7 supports quartz. Common worldwide, especially in continental shields and mountain batholiths.
