Limonite Cubes

Hardness of 4 to 5.5 on the Mohs scale, yellowish-brown to dark brown color, submetallic to earthy luster, and pseudomorphous cubic crystal structure.

Formed through the oxidation and weathering of iron-rich sulfide minerals, particularly pyrite, often resulting in pseudomorphs where limonite replaces the original pyrite crystals.

Used as an iron ore pigment, in mineral collections, and historically as a yellow ochre dye.

Limonite is not a true distinct mineral species, but rather a field term for a mixture of hydrated iron oxides.

Identified by its characteristic yellowish-brown streak and cubic pseudomorph habit; commonly found in oxidized iron ore deposits worldwide.