Moonstone belongs to the Feldspar Group from German Feld, field, and spalten, to split.
This Orthoclase (adularia) species with white shimmer, similar to Moonshine, therefore the name, it is so called adularescence.
The Mohs’ hardness is 6 -6,5
Deposits are found in Sri Lanka, Burma(Myanmar), Brazil, India and Madagascar.
Moonstone is the birthstone of June.