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 world. * Topazolite: Yellow-green in color and sometimes of high enough quality to be cut into a faceted gemstone, it is rarer than demantoid.

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 world. * Topazolite: Yellow-green in color and sometimes of high enough quality to be cut into a faceted gemstone, it is rarer than demantoid.