Sabieite is a

mineral In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. (2 ...

with the chemical formula ( N H₄) Fe³⁺( S O₄)₂. Its type locality is Lone Creek Falls cave,

Sabie Sabie is a forestry town situated on the banks of the Sabie River in Mpumalanga, South Africa. The name Sabie is derived from the siSwati word "Ulusaba" which means "fearful river" because the river was once teeming with dangerous Nile crocodile. ...

, Pilgrim's Rest District Ehlanzeni, Mpumalanga Province,

South Africa South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. It is bounded to the south by of coastline that stretch along the Atlantic Ocean, South Atlantic and Indian Oceans; to the ...

. Its crystals are

trigonal In crystallography, the hexagonal crystal family is one of the six crystal families, which includes two crystal systems (hexagonal and trigonal) and two lattice systems (hexagonal and rhombohedral). While commonly confused, the trigonal crystal ...

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 The Mohs scale of mineral hardness () is a qualitative ordinal scale, from 1 to 10, characterizing scratch resistance of various minerals through the ability of harder material to scratch softer material. The scale was introduced in 1812 by th ...

References

Webmineral.com - SabieiteHandbook of Mineralogy - Sabieite
Iron(III) minerals Sulfate minerals Trigonal minerals Minerals in space group 150 {{Sulfate-mineral-stub