Chemical Formula: Ba(Mn4+6Mn3+2)O16
Locality: Manganese deposits of the Central Provinces of India.
Name Origin: Named for Thomas Henry Holland (1868-1947), Director of the Indian Geologic Survey.
Physical Properties of Hollandite
Color: Grayish black, Black, Silver gray.
Density: 4.7 – 5, Average = 4.84
Fracture: Brittle – Generally displayed by glasses and most non-metallic minerals.
Luster: Earthy (Dull)