Wiktionary
sabieite
n. (context mineralogy English) A trigonal-trapezohedral white mineral containing hydrogen, iron, nitrogen, oxygen, and sulfur.
Wikipedia
Sabieite
Sabieite is a mineral with the chemical formula ( N H) Fe( S O). 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.