metamorphic

White marble (likely calcitic marble)

Calcite-rich marble; primarily calcium carbonate, CaCO₃

AI-generated identification · may be incorrect

White, fine- to medium-grained, crystalline, with a sugary texture and vitreous to pearly luster; Mohs hardness 3, nonfoliated, and typically reacts vigorously with dilute hydrochloric acid. Cleavage is inherited from calcite and fragments may show sparkle.

Identified August 8, 2026More metamorphic →

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Physical properties

Formation & geological history

Formed when limestone or dolostone was recrystallized by heat and pressure during regional or contact metamorphism. Its exact geological age cannot be determined from the photograph; marble occurs in metamorphic belts worldwide.

Uses & applications

Used for sculpture, tiles, countertops, aggregate, lime, and cement; attractive pieces may be polished for decorative or lapidary use.

Geological facts

Marble is not a single mineral but a metamorphic rock dominated by recrystallized carbonate minerals. Impurities such as graphite, iron oxides, or silicates can create gray, green, yellow, or pink colors.

Field identification & locations

Field identification relies on its white crystalline appearance, relatively soft surface, and acid fizz; it can be scratched by steel and is softer than quartz. Common sources include Italy, Greece, Turkey, India, and the United States.