Navajoite is a mineral species that falls under the classification of phosphates. It takes its name from the Navajo Mine in San Juan County, New Mexico, where it was first discovered. The mineral is known for its fine, bladed crystal formations, which often occur in combination with other phosphate minerals.
Navajoite has a relatively rare occurrence and is typically found in oxidized copper ore deposits. It commonly forms as a secondary mineral, resulting from the weathering and alteration of primary copper-bearing minerals. Its color can vary, but it is most commonly identified as dark green or black.
In terms of physical properties, navajoite exhibits a vitreous to greasy luster and has a black to dark green streak. Its hardness is relatively low, typically ranging from 2 to 3 on the Mohs scale. The mineral is also known to be relatively brittle.
Chemically, navajoite is a copper phosphate mineral. Its chemical formula is CuFe6(PO4)4(OH)8·4H2O, indicating the presence of copper (Cu), iron (Fe), phosphate (PO4), hydroxide (OH), and water (H2O) in its composition.
While navajoite may not have significant industrial applications, it is highly regarded among mineral collectors due to its unique crystal formations and distinctive color. It serves as a testament to the intricate geological processes occurring within oxidized copper ore deposits.