| Part of Speech | Definition | |
| Noun | 1. A mineral of a yellowish color, consisting chiefly of silica, glucina, manganese, and iron, with a little sulphur.[Websters]. | |
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Date "HELVITE" was first used in popular English literature: sometime before 1914. (references) |
Specialty Definition: HELVITE
| Domain | Definition | ||
| Mining | An isometric mineral, 2[Mn4 Be3 (SiO4 )3 S] ; manganese may be replaced by iron toward danalite, or by Zn toward genthelvite; forms tetrahedra; Mohs hardness, 6 to 6-1/2; in veins with quartz, hornblende, and iron oxide; in pegmatites, and some alkalineigneous rocks. (references) | ||
Source: compiled by the editor from various references; see credits. | Top | ||
