sedimentary
Quartz-veined Limestone
Sedimentary limestone with quartz/calcite veinlets
Hardness varies from 3 (for the limestone/calcite matrix) to 7 (for the quartz vein). Color is grey with white intersecting veins. Luster is dull to vitreous. Cryptocrystalline structure.
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Physical properties
Hardness varies from 3 (for the limestone/calcite matrix) to 7 (for the quartz vein). Color is grey with white intersecting veins. Luster is dull to vitreous. Cryptocrystalline structure.
Formation & geological history
Formed from the accumulation of organic carbonate materials in marine environments, later fractured and filled with hydrothermal quartz or calcite solutions.
Uses & applications
Used as crushed stone in construction, road aggregate, and geological study.
Geological facts
Veins form when mineral-rich fluids circulate through fractures in existing rock and precipitate minerals into the open spaces.
Field identification & locations
Commonly found in sedimentary regions worldwide; identified by the reactive nature of limestone to acid (effervescence) contrasted with the hardness of the white vein.
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