metamorphic
White marble chips
Marble; predominantly calcite (CaCO₃)
AI-generated identification · may be incorrectTypically white, opaque, and smooth or freshly fractured, with a vitreous to pearly luster; Mohs hardness 3, rhombohedral calcite crystals, and perfect rhombohedral cleavage. The pieces appear tumbled or crushed and may be polished.
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Physical properties
Typically white, opaque, and smooth or freshly fractured, with a vitreous to pearly luster; Mohs hardness 3, rhombohedral calcite crystals, and perfect rhombohedral cleavage. The pieces appear tumbled or crushed and may be polished.
Formation & geological history
Marble forms when limestone or dolostone is recrystallized during regional or contact metamorphism, commonly from Paleozoic or older carbonate rocks. These small pieces are likely processed decorative aggregate rather than natural crystal specimens.
Uses & applications
Used for landscaping, craftwork, mosaic decoration, aquarium substrates, and occasionally terrazzo or construction aggregate; generally low jewelry value.
Geological facts
Calcite effervesces vigorously with dilute hydrochloric acid or strong vinegar, though polished surfaces may react slowly. It is softer than steel and can be scratched with a knife.
Field identification & locations
Identify by its white calcitic appearance, softness, and acid reaction; common sources include Italy, Greece, Turkey, India, and the United States. The image alone cannot exclude white quartz, porcelain, or another processed material.
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