metamorphic
White Marble
Recrystallized Calcite (CaCO3)
AI-generated identification · may be incorrectHardness: 3 on Mohs scale; Color: White to light grey; Luster: Vitreous to pearly; Crystal structure: Trigonal/Hexagonal; Cleavage: Perfect rhombohedral; Specific Gravity: 2.7
- Hardness
- 3 on Mohs scale
- Color
- White to light grey
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 3 on Mohs scale; Color: White to light grey; 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 limestone or dolostone. Heat and pressure cause the calcium carbonate to recrystallize into an interlocking mosaic of calcite crystals.
Uses & applications
Extensively used in construction, sculpture, flooring, and as a calcium supplement in animal feed or industrial acid neutralizers.
Geological facts
Marble has been the preferred medium for sculptors since classical antiquity due to its relative softness and isotropism, which allows it to be carved without shattering.
Field identification & locations
Identify in the field by its softness (can be scratched by a copper penny or steel) and its effervescent reaction to dilute hydrochloric acid. Commonly found in mountainous regions with a history of tectonic activity.
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