Muscovite mica shows which structure?

Which of the following is not true about a mineral?

What is the diaphaneity of muscovite mica?

The ferro-magnesium mineral which occurs in ultra-basic igneous rocks is ______

The scale of hardness is?

The density range lies between 2.5 and 4.5 g/cc for ______

Which lustre cannot occur to the calcite?

The mineral not belonging to the quartz group is _______