Minerals identify

Know how to recognize them

Sewardite

Arsenate mineral

Sewardite is a rare arsenate mineral with formula of CaFe2+3(AsO4)2(OH)2. Sewardite was discovered in 1982 and named for the mineralogist, Terry M. Seward in Zürich

Identification

Color of mineral

Red
Orange

Mohs scale ( mineral hardness )

3.5

The streak

Brown

Density ( specific gravity )

1.94

Luster ( interacts light )

Vitreous

Crystal ( diaphaneity )

Orthorhombic