Hardness of human nail varies between _______

Which mineral is used as refractory material?

What is the diaphaneity of pure gypsum?

Streak colour and colour of the mineral are always same.

Pick the quartz mineral which is translucent among the following.

Metallic minerals belong to which category with respect to colour?

What is the streak given by muscovite mica?

Name the carbonate mineral which is found in ultrabasic igneous rocks.