igneous
Granite pavement or building stone
Granite — coarse-grained quartz, feldspar, and mica-bearing granitoid
AI-generated identification · may be incorrectPale gray with dark mineral flecks and a speckled, crystalline texture; typically Mohs 6–7, vitreous quartz and feldspar luster, with no prominent cleavage in the rock as a whole. The image appears to show a weathered or stained cut surface, so mineral identification is not certain from the photograph.
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Physical properties
Pale gray with dark mineral flecks and a speckled, crystalline texture; typically Mohs 6–7, vitreous quartz and feldspar luster, with no prominent cleavage in the rock as a whole. The image appears to show a weathered or stained cut surface, so mineral identification is not certain from the photograph.
Formation & geological history
Granite forms when silica-rich magma cools slowly underground, allowing crystals to grow; granitoids occur in continental crust of many ages. This image does not reveal the specimen’s specific geological age or source.
Uses & applications
Commonly used for paving, building facings, countertops, monuments, and aggregate; intact architectural pieces may have little collector value.
Geological facts
The contrasting light and dark speckles usually reflect quartz and feldspar alongside darker minerals such as biotite or amphibole.
Field identification & locations
A hard, granular surface with interlocking visible crystals supports granite identification; confirm by inspecting a fresh edge for quartz and feldspar. Granite is widespread worldwide, but the image alone cannot establish the exact stone type.
