glance
Sign in to saveAlso known as galenoids, glances
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.
Wikidata facts
- Subclass of
- mineral
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- Bismuthinite-23175.jpg
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- Commons category
- Glances
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~11 min read
Encyclopedic overview
6 sectionsContents
- Characteristics of the group
- General properties
- The most famous varieties
- Deposits
- References
- See also
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.
Unlike the related pyrites or blendes, glosses are not considered ″colored″ because they do not have the yellowish or reddish ″copper″ tones, although impurities may well give individual varieties shades of color.
Excerpted from Wikipedia’s “glance” article, available under the CC BY-SA 4.0 licence.