A crystal or mineral that contains the inclusions of smaller crystals of different minerals or may be is the same as host mineral.
See Alexandrite Tsarstone collectors guide, Definition of Host crystal, http://w.alexandrite.com/viewpage.html?id=GG-093-00004 (A crystal or mineral that contains the inclusions of smaller crystals of different minerals or may be is the same as host mineral.) (as of May. 31, 2026, 12:31 GMT).