metamorphic
Marble
Recrystallized Calcite (CaCO3) Rock
Hardness: 3 on Mohs scale; Color: White with crystalline sparkles; Luster: Pearly to vitreous; Structure: Granoblastic (sugary texture); Cleavage: Rhombohedral cleavage in individual grains; Specific Gravity: 2.7
- Hardness
- 3 on Mohs scale
- Color
- White with crystalline sparkles
- Luster
- Pearly to vitreous
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 3 on Mohs scale; Color: White with crystalline sparkles; Luster: Pearly to vitreous; Structure: Granoblastic (sugary texture); Cleavage: Rhombohedral cleavage in individual grains; Specific Gravity: 2.7
Formation & geological history
Formed from the metamorphism of limestone or dolostone under high pressure and temperature. This process leads to the recrystallization of carbonate minerals into a dense, interlocking mosaic of calcite or dolomite crystals.
Uses & applications
Used widely in construction and architecture (countertops, tiles), sculpture (due to its relative softness for carving), and in crushed form as an industrial pH neutralizer or agricultural lime.
Geological facts
The Taj Mahal is constructed almost entirely of white marble. The term 'marble' technically refers specifically to metamorphosed limestone, though in the trade, any polishable carbonate rock is often called marble.
Field identification & locations
Identify in the field by its softness (can be scratched by a steel blade) and its vigorous effervescence (bubbling) when a drop of dilute hydrochloric acid or vinegar is applied. Commonly found in mountainous regions with ancient limestone basements.
More like this
