metamorphic
Marble
Recrystallized Calcite (CaCO3)
Hardness: 3 on Mohs scale; Color: Pure white (though can be veined); Luster: Vitreous to pearly; Crystal structure: Trigonal/Hexagonal; Cleavage: Perfect rhombohedral; Specific gravity: 2.7
- Hardness
- 3 on Mohs scale
- Color
- Pure white (though can be veined)
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 3 on Mohs scale; Color: Pure white (though can be veined); Luster: Vitreous to pearly; Crystal structure: Trigonal/Hexagonal; Cleavage: Perfect rhombohedral; Specific gravity: 2.7
Formation & geological history
Formed through the regional or contact metamorphism of sedimentary carbonate rocks, most commonly limestone or dolostone, under high heat and pressure.
Uses & applications
Extensively used in construction for flooring and countertops, sculpture and monument carving, and as a calcium source in industry.
Geological facts
The word 'marble' derives from the Greek 'marmaros,' meaning 'shining stone.' Michelangelo's 'David' was carved from high-quality Carrara marble.
Field identification & locations
Identify in the field by its crystalline texture and its reaction (effervescence) when touched with dilute hydrochloric acid. Found in mountainous regions with a history of tectonic activity.
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