Andradite

Andradite is a species of the garnet group. It is a nesosilicate, with formula Ca3Fe2Si3O12.

Andradite includes three varieties: * Melanite: Black in color, referred to as "titanian andradite". * Demantoid : Vivid green in color, one of the most valuable and rare stones in the gemological * Topazolite: Yellow-green in color and sometimes of high enough quality to be cut into a faceted gemstone

It was first described in 1868 for an occurrence in Drammen , Buskerud Andradite was named after the Brazilian statesman, naturalist, professor and poet José Bonifácio de Andrada e Silva