The mass of the unit volume of material in its natural state is known as

The property of a material to absorb water vapour from air is known as

Argil formed from

Example for Hypabyssal rock

In which rocks have a tendency to be split up in a definite direction

Witch test is conducted for the presence of soluble matters presented in stones

The tiles are burnt in

The chief ingredient in brick earth is

If tempering is properly carried out, the good brick earth can then be rolled without breaking in small threads of

Which kiln is also known as flame kiln