Bromargyrite, Alunite (Fov 3 x 3 mm) Locality: Chimberos mine, Mantos de Oro district, Chañaral Province, Atacama Region, Chile Another group of flat with hexag — Photo: Maurizio Dini · CC BY 3.0
Bromargyrite
Natural silver bromide — a soft secondary mineral found mainly in the oxidized silver ores of Mexico and Chile.
Intro adapted from Wikipedia (CC BY-SA).
Bromargyrite is an IMA-recognized mineral species in the halide class, with the chemical formula AgBr.
It crystallizes in the cubic crystal system (space group Fm3m).
Key properties: Mohs hardness 2.5; specific gravity 6.474; typically yellow or green; White to yellowish white streak; Resinous to adamantine, waxy luster.
IMA symbol Bag, IMA status: approved, named in 1849.
A rare secondary mineral found in the oxidation zones of silver deposits, notably in arid regions.
It is found associated with Silver, iodargyrite, smithsonite, Fe–Mn oxides.
The name refers to BROMine and the Greek for silver, argyros, in its composition.
Collections: Collector Favorites, Rare & Remarkable.