igneous
Pink granite pebble
Granite, composed mainly of quartz, potassium feldspar, plagioclase, and biotite/hornblende
AI-generated identification · may be incorrectFine- to medium-grained, pinkish-tan, with dark mineral flecks and a dull-to-waxy weathered luster; hardness about 6–7 Mohs, no prominent cleavage as a rock, and specific gravity around 2.6–2.7.
Identified More igneous →
Explore Pink granite pebble in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Fine- to medium-grained, pinkish-tan, with dark mineral flecks and a dull-to-waxy weathered luster; hardness about 6–7 Mohs, no prominent cleavage as a rock, and specific gravity around 2.6–2.7.
Formation & geological history
An intrusive igneous rock formed when silica-rich magma slowly crystallized deep underground, commonly during Precambrian to Phanerozoic mountain-building events; this specimen was naturally rounded by erosion and transport.
Uses & applications
Crushed granite is used for aggregate, road stone, and construction; sound blocks are used for countertops and monuments, while small polished pebbles are sold for landscaping and collecting.
Geological facts
The pink color generally comes from potassium feldspar, while black specks are mafic minerals such as biotite or hornblende. Its visible interlocking grains indicate slow cooling rather than volcanic eruption.
Field identification & locations
Identify it by its granular texture, pink feldspar, translucent or gray quartz, and scattered black grains; it commonly occurs in continental shield regions, mountain belts, streambeds, and glacial deposits.
