igneous
Pink Granite
Phaneritic Granitoid
Hardness: 6-7 Mohs; Color: Pink, reddish-brown, with grey/black specks; Luster: Dull to vitreous; Crystal structure: Coarse-grained phaneritic; Cleavage: Good in feldspar grains; Specific gravity: 2.63-2.75
- Hardness
- 6-7 Mohs
- Color
- Pink, reddish-brown, with grey/black specks
- Luster
- Dull to vitreous
Identified More igneous →
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Physical properties
Hardness: 6-7 Mohs; Color: Pink, reddish-brown, with grey/black specks; Luster: Dull to vitreous; Crystal structure: Coarse-grained phaneritic; Cleavage: Good in feldspar grains; Specific gravity: 2.63-2.75
Formation & geological history
Formed from the slow cooling of silica-rich magma deep underground. These rocks are often part of the Neoproterozoic Pan-African orogenic belt common in West Africa, dated between 500-700 million years ago.
Uses & applications
Used extensively in construction for aggregate, paving stones, countertops, and decorative masonry due to its durability.
Geological facts
The pink color comes from a high concentration of potassium feldspar (orthoclase). Granites make up a large portion of the Earth's continental crust.
Field identification & locations
Located in a region (Southeastern Nigeria) known for the Basement Complex consisting of igneous and metamorphic rocks. Field identification is based on the visible interlocking crystals of pink feldspar, clear quartz, and dark biotite or hornblende.
