Building Materials
The rocks having alumina or clay as their major constituents are known as

Sedimentary rocks
Calcareous rocks
Argillaceous rocks
Siliceous rocks

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Building Materials
Acrylic sheets

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

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