sedimentary
Vein Quartz in Limestone
Calcium carbonate with silicon dioxide (CaCO3 + SiO2)
AI-generated identification · may be incorrectHardness varies from 3 for limestone to 7 for quartz; color is dark grey with white veins; luster ranges from dull to vitreous.
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Physical properties
Hardness varies from 3 for limestone to 7 for quartz; color is dark grey with white veins; luster ranges from dull to vitreous.
Formation & geological history
Formed through the accumulation of marine organism shells later fractured and healed by hydrothermal silica-rich fluids.
Uses & applications
Used in landscaping, aggregate, and as mineral collecting specimens.
Geological facts
The contrasting white quartz veins provide a clear geological history of fracturing and mineralization within the host rock.
Field identification & locations
Identify by testing hardness differences between the softer grey matrix and the harder white veins, which will scratch glass.
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