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

Volcanic rocks
Hypabyssal rocks
Plutonic rocks
Igneous rocks

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Building Materials
Asbestos

Contains iron oxide and alumina
All of these
Is a natural fibrous mineral substance
Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3)

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