igneous
Granite Pebble
Granite
Hardness: 6-7 Mohs; Color: White/Grey base with black speckled inclusions; Luster: Vitreous to dull; Structure: Phaneritic (crystalline); Specific Gravity: 2.63-2.75
- Hardness
- 6-7 Mohs
- Color
- White/Grey base with black speckled inclusions
- Luster
- Vitreous to dull
Identified More igneous →
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Physical properties
Hardness: 6-7 Mohs; Color: White/Grey base with black speckled inclusions; Luster: Vitreous to dull; Structure: Phaneritic (crystalline); Specific Gravity: 2.63-2.75
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface. This specific specimen is likely a water-worn or weathered pebble found in a riverbed or coastal area.
Uses & applications
Primarily used in construction, countertops, and as decorative stone or aggregate.
Geological facts
Granite is one of the most common rocks in the Earth's continental crust and is often used as a benchmark for measuring the strength of other building materials.
Field identification & locations
Identify in the field by its interlocking crystal grains of quartz (clear/grey) and feldspar (white) with biotite or hornblende (dark spots). Found worldwide, especially in mountainous regions or river deposits.
