metamorphic
Marble (Sculpted Statue)
Metamorphic Limestone (composed primarily of Calcite, CaCO3)
Hardness: 3 on Mohs scale. Color: Weathered off-white to gray with darker lichen/moss patina. Luster: Dull to sugary/granular (crystalline). Cleavage: Perfect rhombohedral in calcite grains. Specific Gravity: ~2.7.
- Hardness
- 3 on Mohs scale
- Color
- Weathered off-white to gray with darker lichen/moss patina
- Luster
- Dull to sugary/granular (crystalline)
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Physical properties
Hardness: 3 on Mohs scale. Color: Weathered off-white to gray with darker lichen/moss patina. Luster: Dull to sugary/granular (crystalline). Cleavage: Perfect rhombohedral in calcite grains. Specific Gravity: ~2.7.
Formation & geological history
Formed through the regional or contact metamorphism of limestone under intense heat and pressure, causing recrystallization of carbonate mineral grains. Marble used in traditional European statuary often originates from historic quarries such as Carrara, Italy.
Uses & applications
Sculpting, architectural monuments, decorative garden statues, and historical artworks.
Geological facts
Marble has been the preferred medium for classical sculptors since Greek and Roman antiquity due to its relative softness when freshly quarried and its fine-grained translucent quality, known as 'depth of light'.
Field identification & locations
Identified by its reaction to dilute hydrochloric acid (effervesces), Mohs hardness of 3 (can be scratched with a steel nail), and visible interlocking calcite grains. Garden statues like this typically show significant atmospheric weathering and biological growth over time.
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