Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Bixbyite is a manganese iron oxide mineral with formula: (Mn,Fe)2O3. The iron:manganese ratio is quite variable and many specimens have almost no iron. It is a metallic dark black with a Mohs hardness of 6.0 - 6.5 and a specific gravity of 4.9 - 5.0. It is a somewhat rare mineral sought after by collectors as it typically forms euhedral isometric crystals exhibiting various cubes, octahedrons, and dodecahedrons.

Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.