La mélanite est une variété noire, titanifère de grenat andradite.
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Mélanite
- Translations : Melanite, Melanit, Melanita, 黑榴石
- Etymology : Du the Grec μελανός = noir.
- Discovery: 1799 by Augustus Gottlob Werner
Gemological data
- Chemical formula : Ca3 Fe2 +3 (SiO4)3
- Hardness (Mohs) : 6.5 - 7
- Density : 3.7 - 4.1
- Refractive index : 1.855 - 1.895
- Birefingence : 0.057
- Crystal system : Cubique
- Group : Grenat
