sedimentary

Quartz-veined Limestone

Sedimentary limestone with quartz/calcite veinlets

AI-generated identification · may be incorrect

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.

Identified July 31, 2026More sedimentary →

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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.