Classification of minerals

elements that occur in nature as minerals in uncombined form

method of classifying minerals. Use Q12110334 for a particular class or grouping of minerals

Glance or glances (), sometimes also galenoids (similar to galena) — obsolete or partially obsolete collective name for the morphological group of minerals, compiled according to external characteristics. The group included more than three dozen names, mainly from the group of sulfides and related compounds. As a rule, different examples of glosses have a gray mirror or metallic luster with refractive indices above 3, and sometimes a metallike appearance.