Quartzite

Quartzite

 

QuartziteQuartzite is a metamorphic rock derived from sandstone that is distinguished from sandstone by its fracture. Sandstone breaks along grain boundaries, whereas rock is so well indurated (hardened) that it breaks across constituent grains. 

Type:  Rock

Color: Usually white or gray, can be other colors, due to impurities.

 

Description

Quartzite is a metamorphic rock derived from sandstone that is distinguished from sandstone by its fracture. Sandstone breaks along grain boundaries, whereas quartzite is so well indurated (hardened) that it breaks across constituent grains. The intense heat and pressure of metamorphism cause the quartz grains to compact and become tightly intergrown with each other, resulting in very hard and dense rock.

Relation to Mining

Because it is so dense and resistant to both physical and chemical weathering, it is a poor bedrock on which to form soil. As a result, typically-quarried quartzite is very near the surface. Because it is so hard and dense, quartzite has not been quarried as extensively as other softer dimension stone (such as limestone, sandstone and granite).

Uses

Since quartzite breaks into flat surfaces, it is used as a dimension stone in the construction industry, for decorative stone in building construction and for some aggregates.

Quartzite crusher plant

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