ALL_TAB_PRIVS

Grants on objects for which the user is the grantor grantee owner or an enabled role or PUBLIC is the grantee

Columns
   ___________________________
 
   GRANTOR
      Name of the user who performed the grant
   GRANTEE
      Name of the user to whom access was granted
   TABLE_SCHEMA
      Schema of the object
   TABLE_NAME
      Name of the object
   PRIVILEGE
      Table Privilege
   GRANTABLE
      Privilege is grantable
   HIERARCHY
      Privilege is with hierarchy option