igneous
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
Hardness: 6-7 on Mohs scale; Color: mottled tan, grey, and black; Luster: dull to vitreous; Structure: phaneritic (visible crystals); Specific Gravity: 2.63 to 2.75.
- Hardness
- 6-7 on Mohs scale
- Color
- mottled tan, grey, and black
- Luster
- dull to vitreous
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Physical properties
Hardness: 6-7 on Mohs scale; Color: mottled tan, grey, and black; Luster: dull to vitreous; Structure: phaneritic (visible crystals); Specific Gravity: 2.63 to 2.75.
Formation & geological history
Formed by the slow crystallization of magma below the Earth's surface. Given the location near Shiraz, Iran, this likely originates from the Sanandaj-Sirjan zone, known for its diverse igneous and metamorphic complexes.
Uses & applications
Widely used for dimension stone, countertops, floor tiles, and as a durable construction aggregate. Highly valued for its hardness and resistance to erosion.
Geological facts
Granite makes up a large portion of the Earth's continental crust. It is one of the oldest and most durable stones used by humans since antiquity for monuments and building.
Field identification & locations
Identify in the field by its 'salt and pepper' appearance and visible interlocking crystals. Common in the Zagros orogenic belt areas of Iran where deeper basement rocks are uplifted.
