The scientific study of minerals; their formation, occurrence, chemical composition, physical properties, and their classification. Oryctognosy and oryctology are obsolete terms.
See Alexandrite Tsarstone collectors guide, Definition of Mineralogy, http://w.alexandrite.com/viewpage.html?id=GG-098-00006 (The scientific study of minerals; their formation, occurrence, chemical composition, physical properties, and their classification. Oryctognosy and oryctology are obsolete terms.) (as of May. 31, 2026, 09:28 GMT).