igneous
Granite
Granite, chiefly quartz, feldspar, and mica
AI-generated identification · may be incorrectCoarse-grained, mottled pale green-gray and cream with dark mineral flecks; visible interlocking crystals suggest quartz and feldspar. Typical hardness is about 6–7 Mohs; luster is mostly vitreous to dull, with no prominent cleavage.
Identified More igneous →
Explore Granite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Coarse-grained, mottled pale green-gray and cream with dark mineral flecks; visible interlocking crystals suggest quartz and feldspar. Typical hardness is about 6–7 Mohs; luster is mostly vitreous to dull, with no prominent cleavage.
Formation & geological history
Granite forms when silica-rich magma cools slowly underground, allowing crystals to grow. Its age varies widely; the image alone cannot determine its geological age.
Uses & applications
Granite is widely used as dimension stone, countertops, paving, and aggregate; small specimens are kept for collecting.
Geological facts
The visible speckled texture is characteristic of interlocking minerals, but the green cast may reflect alteration or lighting.
Field identification & locations
A hand-sized, rounded piece with this texture is consistent with granite, though a photo cannot confirm the identification. Granite occurs worldwide in continental crust; inspect a fresh surface for distinct quartz, feldspar, and mica grains.
