metamorphic
Marble
Recrystallized Calcite (CaCO3)
Hardness: 3 on Mohs scale; Color: White to light grey; Luster: Vitreous to pearly; Crystal structure: Trigonal/Hexagonal (granular texture); 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 (granular texture); Specific gravity: 2.7
Formation & geological history
Formed through the regional or contact metamorphism of sedimentary carbonate rocks, such as limestone or dolostone, under high heat and pressure.
Uses & applications
Widely used in construction for tiles, countertops, and decorative panels. Also used in sculpture due to its relative softness and uniform texture.
Geological facts
The word 'marble' derives from Greek for 'shining stone'. Famous examples include the Taj Mahal and Michelangelo's David.
Field identification & locations
Identify by its softness (easily scratched by a steel nail) and its strong effervescence when exposed to a drop of dilute hydrochloric acid. Commonly found in mountainous regions near tectonic plate boundaries.
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