metamorphic
White Marble
Recrystallized Carbonate Rock (CaCO3)
Hardness: 3 on Mohs scale; Color: pure white to off-white; Luster: crystalline to sugary; Crystal structure: Trigonal/Hexagonal; Cleavage: rhombohedral; Specific gravity: 2.7
- Hardness
- 3 on Mohs scale
- Color
- pure white to off-white
- Luster
- crystalline to sugary
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Physical properties
Hardness: 3 on Mohs scale; Color: pure white to off-white; Luster: crystalline to sugary; Crystal structure: Trigonal/Hexagonal; Cleavage: rhombohedral; Specific gravity: 2.7
Formation & geological history
Formed from the regional or contact metamorphism of limestone or dolostone under intense heat and pressure, causing recrystallization of calcite grains.
Uses & applications
Used in sculpture, high-end construction (flooring, countertops), pharmaceuticals as an antacid, and as a filler in paper and paint.
Geological facts
The Taj Mahal is constructed almost entirely of white Makrana marble. Pure white marble is the result of metamorphism of very pure limestone.
Field identification & locations
Identified by its sugary texture and reaction to dilute hydrochloric acid (it will fizz). Commonly found in mountainous regions with a history of tectonic activity.
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