1
It is the ability of some minerals to split along planes
2
It is the ability of the mineral´s surface to resist scratching.
3
The .......................... nature is the property of attracting metals
5
The colour of the powdered mineral when rubbed across, is the colour of ...
6
It is the appearence of the mineral´s surface on reflecting light
7
The external shape of a mineral is geometrical forming cristals.
