Leisingite

General Information: Chemical Formula:Cu(Mg,Cu,Fe,Zn)2Te++++++O6·6(H2O) Environment:From a secondary alteration zone. IMA Status:Approved IMA (Dana # Added) Locality:The dumps of the Centennial Eureka mine, Tintic District, Juab County, Utah, USA. Name Origin:For Mr. Joseph F. Leising (1949-), geologist and mineral collector of Reno, Nevada, USA.Physical Properties: Cleavage:[001] Perfect Color:yellow or yellowish orange. Density:3.41 Diaphaniety:Transparent to Translucent Habits:Platy - Sheet forms (e.g. micas)., Microscopic Crystals - Crystals visible only with microscopes., Hardness:3-4 - Calcite-Fluorite Luminescence:Non-fluorescent. Luster:Vitreous - Silky Streak:light yellowMore details...