Mineral · Garnet group
Grossular
Ca3Al2(SiO4)3
Grossular is calcium aluminium garnet in brown, orange (hessonite), green (tsavorite), pink and white; the Jeffrey Mine at Asbestos, Quebec, produced the finest orange and pink crystals, and Sierra de Cruces (Mexico) supplies cheap raspberry-pink dodecahedra. Green massive grossular from Africa is sold as 'Transvaal jade'. It is often confused with vesuvianite from the same skarns.
| Formula | Ca3Al2(SiO4)3 |
|---|---|
| IMA status | grandfathered |
| Crystal system | Cubic |
| Mohs hardness | 6.5–7 |
| Group | Garnet group |
| Type locality | Wiluy River, Sakha, Russia |
| Streak | White |
| Specific gravity | 3.6 |
| Reference list | IMA List of Minerals (RRUFF) — verify formula and status against the current list |
Elsewhere
Cite this article
Stratum Study. "Grossular" (Mineral). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/minerals/grossular. Accessed 2026-09-20.
@misc{stratum-grossular,
title = {Grossular},
author = {{Stratum Study}},
howpublished = {\url{https://stratum.black/study/minerals/grossular}},
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.