exclusiveness
noun /ɪkˈskluːsɪvnəs/
  /ɪkˈskluːsɪvnəs/
(also exclusivity)
 [uncountable]- the fact of being of a high quality and expensive and therefore not often bought or used by most people
- For all its exclusiveness, the island is also thoroughly West Indian and so it is easy-going.
 
 - the practice in a group or society of not allowing other people from different groups to become members or be included
- the exclusiveness of the social classes before 1914
 - social/religious/racial exclusiveness