Ferrous iron sulphate heptahydrate, crystallizing in the monoclinic system and occurring as translucent green, blue, or white crystals, often with marcasite; native copperas.
Origin
Early 19th century. From French mélantérite from ancient Greek μελαντηρία black pigment + French -ite.
Definition of melanterite in US English:
melanterite
nounmɪˈlantərʌɪt
Mineralogy
Ferrous iron sulphate heptahydrate, crystallizing in the monoclinic system and occurring as translucent green, blue, or white crystals, often with marcasite; native copperas.
Origin
Early 19th century. From French mélantérite from ancient Greek μελαντηρία black pigment + French -ite.