valgite

Valgite is a fictional mineral name used in educational materials and online glossaries to illustrate how mineral entries are structured. It is not recognized by the International Mineralogical Association (IMA) or listed in major reference databases such as Mindat.org. Consequently, there is no verified chemical formula, crystallography, or occurrence associated with valgite in peer-reviewed mineralogy.

In teaching examples, valgite is described with provisional characteristics chosen to demonstrate standard descriptors: for instance, it may be said to occur as small, prismatic crystals; exhibit a vitreous to resinous luster; and have a Mohs hardness within a middle range. The crystal system and chemical composition are intentionally variable across different educational texts, underscoring that valgite is used for demonstrative purposes rather than documentation of a real mineral.

As a result, information about valgite should be treated as fictional. If you encounter a source that claims valgite is real, verify it against reputable mineralogical databases and peer-reviewed literature.