Marble

Physical Properties

Hardness: 3 on Mohs scale; Color: typically white or grayish; Luster: vitreous to pearly; Crystal Structure: Trigonal (rhombohedral); 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

Extensively used in construction, sculpture, flooring, and as a raw material for lime and agricultural supplements.

Geological Facts

Pure white marble consists of almost pure calcite. Many of history's most famous sculptures, including Michelangelo's David, were carved from Carrara marble.

Field Identification & Locations

Identify in the field by its softness (can be scratched by a copper coin) and its vigorous effervescence when exposed to a drop of dilute hydrochloric acid. It typically shows a crystalline, sugary texture.

Identified on: 4/20/2026

Mode: Standard