igneous
Granite
Phaneritic Igneous Rock (composed of Quartz, Feldspar, and Mica)
Hardness: 6-7 Mohs; Color: Grey with pinkish feldspar phenocrysts; Luster: Vitreous/Glossy (polished); Structure: Phaneritic (visible crystals); Specific Gravity: 2.63 - 2.75
- Hardness
- 6-7 Mohs
- Color
- Grey with pinkish feldspar phenocrysts
- Luster
- Vitreous/Glossy (polished)
Identified More igneous →
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Physical properties
Hardness: 6-7 Mohs; Color: Grey with pinkish feldspar phenocrysts; Luster: Vitreous/Glossy (polished); Structure: Phaneritic (visible crystals); Specific Gravity: 2.63 - 2.75
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface. This specimen appears as a tumbled or water-worn pebble, likely originating from a plutonic intrusion millions of years old.
Uses & applications
Commonly used in construction for countertops and floor tiles; smaller polished pieces are used as decorative stones or in landscaping.
Geological facts
Granite is one of the most common rocks on the Earth's continental crust. The pink color in this specimen is specifically caused by Potassium Feldspar.
Field identification & locations
Identify by its interlocking crystalline texture and speckled appearance. It is incredibly durable and resistant to acid, making it easy to distinguish from softer rocks like marble.
