Rock Identifier
Ferrochrome Slag (Calcium-Aluminium-Magnesium Silicate Slag) — industrial byproduct
industrial byproduct

Ferrochrome Slag

Calcium-Aluminium-Magnesium Silicate Slag

Hardness varies from 6 to 7 on the Mohs scale, color ranges from dark grey to light grey with a stony or vitreous luster, amorphous to crystalline structure with angular, irregular fragment shapes and rough texture.

Identified More industrial byproduct
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Physical properties

Hardness varies from 6 to 7 on the Mohs scale, color ranges from dark grey to light grey with a stony or vitreous luster, amorphous to crystalline structure with angular, irregular fragment shapes and rough texture.

Formation & geological history

Formed as a molten waste byproduct during the smelting and production of ferrochrome alloy in electric arc furnaces, subsequently cooled and crushed.

Uses & applications

Commonly used as construction aggregate, road base material, abrasive blasting grit, and in cement production.

Geological facts

Slag materials are frequently recycled from metallurgical industries, transforming what would be waste into useful civil engineering and construction materials.

Field identification & locations

Can be identified in industrial contexts by its typical vesicular or glassy texture, heavy weight compared to standard rock aggregate, and metallic sheen from trace metal inclusions. Found near steel-making and smelting facilities.