Building Materials
The rocks which are formed due to cooling of magma at a considerable depth from earth's surface are called

Hypabyssal rocks
Volcanic rocks
Igneous rocks
Plutonic rocks

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Building Materials
Acrylic sheets

Possess 10 to 17 times greater breakage resistance than that of glass of equivalent thickness
Possess the light transmission rate of 93%
All of these
Are generally unaffected by most household detergents

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