Mineral · Sorosilicates
Vesuvianite
(Ca,Na)19(Al,Mg,Fe)13(SiO4)10(Si2O7)4(OH,F,O)10
Vesuvianite (idocrase) is the green to brown tetragonal prism of skarns and altered limestones, classic from the Jeffrey Mine (Quebec, purple and green), Bellecombe (Italy), Vesuvius and Pakistan. It is often confused with grossular garnet from the same rocks; square prisms with striations versus dodecahedra settle it. Jeffrey Mine vesuvianite is a collector's classic now that the mine is closed.
| Formula | (Ca,Na)19(Al,Mg,Fe)13(SiO4)10(Si2O7)4(OH,F,O)10 |
|---|---|
| IMA status | grandfathered |
| Crystal system | Tetragonal |
| Mohs hardness | 6–7 |
| Group | Sorosilicates |
| Type locality | Vesuvius, Italy |
| Streak | White |
| Specific gravity | 3.4 |
| Reference list | IMA List of Minerals (RRUFF) — verify formula and status against the current list |
Elsewhere
Cite this article
Stratum Study. "Vesuvianite" (Mineral). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/minerals/vesuvianite. Accessed 2026-09-20.
@misc{stratum-vesuvianite,
title = {Vesuvianite},
author = {{Stratum Study}},
howpublished = {\url{https://stratum.black/study/minerals/vesuvianite}},
year = {2026},
note = {Mineral article, Stratum Study pack 2026.09, as of 2026-09-19; sources: stratum, wikidata, commons. Accessed 2026-09-20.}
} Citations carry the pack version and the article's as-of date so they resolve to the same text later. The facts themselves belong to the sources listed below; cite those for the science.