metamorphic

Banded marble (probable calcite marble)

Calcite marble, CaCO₃; possibly impure dolomitic marble

AI-generated identification · may be incorrect

White to cream, gray- and brown-banded specimen with a sugary crystalline texture and vitreous to pearly luster. Calcite has Mohs hardness 3, rhombohedral cleavage, and specific gravity about 2.7; it effervesces strongly with dilute hydrochloric acid.

Identified September 1, 2026More metamorphic →

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Physical properties

Formation & geological history

Formed when limestone recrystallized during regional or contact metamorphism, commonly from Paleozoic or younger carbonate rocks. Banding reflects original sedimentary layers and impurities such as clay, iron oxides, or graphite.

Uses & applications

Used as dimension stone, tiles, sculpture, aggregate, and architectural facing; attractive pieces are collected or polished for decorative objects.

Geological facts

Marble is defined by metamorphic recrystallization, not simply by whiteness. Calcite-rich varieties are softer and more acid-sensitive than quartzite.

Field identification & locations

Look for interlocking calcite grains, curved mineral bands, and acid fizz; a knife may scratch it. Common deposits occur in Italy, Greece, Vermont, Colorado, India, and Turkey.