Sabieite
Sabieite is a mineral with the chemical formula (NH4)Fe(SO4)2. Its type locality is Lone Creek Falls cave, Sabie, Pilgrim's Rest District (Ehlanzeni), Mpumalanga Province, South Africa. Its crystals are trigonal to trapezohedral. It is white and leaves a white streak. It is transparent and has an earthy luster. Sabieite is rated 2 on the Mohs Scale.