Augite mainly consists of ______

A colour is produced due to _______

How many minerals are present in the scale of fusibility given by Von Kobell?

The Phenomenon where electric charge develops due to application of pressure is ______

Specific gravity of mineral changes with temperature.

The minerals which develop electric charge upon heating are called ______

What is the colour and streak of olivine respectively?

The type of cleavage due to the mineral can be split very easily is _______