igneous
Pink Granite
Phaneritic intrusive igneous rock with dominant Alkali Feldspar
Hardness: 6-7 on Mohs scale; Color: Pink, reddish-orange to tan with black and white specks; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Cleavage: Perfect in two directions in the feldspar minerals.
- Hardness
- 6-7 on Mohs scale
- Color
- Pink, reddish-orange to tan with black and white specks
- Luster
- Vitreous to dull
Identified More igneous →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-7 on Mohs scale; Color: Pink, reddish-orange to tan with black and white specks; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Cleavage: Perfect in two directions in the feldspar minerals.
Formation & geological history
Formed from the slow crystallization of magma below the Earth's surface. This cooling happens over millions of years, allowing large crystals of quartz, potassium feldspar, and mica to grow. This specific red/pink variety indicates a high concentration of orthoclase (potassium) feldspar.
Uses & applications
Used extensively in construction for countertops, floor tiles, paving stones, curbing, and monuments. It is highly valued for its durability and aesthetic appeal in architecture and landscaping.
Geological facts
The pink or red color in granite is specifically caused by the presence of Orthoclase (potassium feldspar). If the mineral composition was different, the rock might appear grey or white. Famous structures like the red granite pyramids of Giza utilize similar materials.
Field identification & locations
Identify in the field by its interlocking coarse grains of pink minerals mixed with translucent quartz and dark biotite or hornblende. Commonly found in batholiths and mountain ranges. Tip: check for the way light reflects off the flat cleavage planes of the large pink feldspar crystals.
