igneous
Pink Granite Porphyry
Phaneritic Granodiorite (Quartz + Feldspar + Mica)
Hardness: 6-7 Mohs; Color: Pink, grey, and black mottled; Luster: Dull to vitreous; Structure: Crystalline; Cleavage: None overall, but feldspar grains show 90-degree cleavage planes.
- Hardness
- 6-7 Mohs
- Color
- Pink, grey, and black mottled
- Luster
- Dull to vitreous
Identified More igneous →
Explore Pink Granite Porphyry in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-7 Mohs; Color: Pink, grey, and black mottled; Luster: Dull to vitreous; Structure: Crystalline; Cleavage: None overall, but feldspar grains show 90-degree cleavage planes.
Formation & geological history
Formed from the slow cooling of silica-rich magma deep underground. Its water-worn rounded shape suggests it was transported by a river or glacial action during the late Holocene era.
Uses & applications
Used extensively in heavy construction as crushed stone, in architectural siding, countertops, and as ornamental gravel for landscaping.
Geological facts
Granite makes up a large portion of the Earth's continental crust. Its pink color specifically comes from the presence of Potassium Feldspar (Orthoclase).
Field identification & locations
Identify in the field by the interlocking mosaic of visible mineral crystals and its characteristic 'salt and pepper' look often tinged with pink. Commonly found in mountainous regions or as cobbles in glacial till areas.
