igneous
Slag
Industrial Silicate Slag
AI-generated identification · may be incorrectHardness varies from 5 to 6 on the Mohs scale. Colors range from dark gray to glassy black with vitreous to dull luster.
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Physical properties
Hardness varies from 5 to 6 on the Mohs scale. Colors range from dark gray to glassy black with vitreous to dull luster.
Formation & geological history
Formed as a byproduct of smelting ore to purify metals, cooling rapidly from industrial high-temperature melts.
Uses & applications
Used in road construction, cement production, and occasionally as decorative ballast or landscaping material.
Geological facts
Slag often mimics natural volcanic glass like obsidian due to its glassy texture and conchoidal fracture.
Field identification & locations
Identified by vesicular, bubbly textures and proximity to industrial sites or historical mining areas.
