Riebeckite
Riebeckite is a silicate mineral recognized among collectors for its crystal form and distribution, with known Chinese sources.
About Riebeckite
Riebeckite is a silicate mineral in the amphibole group — sodic amphiboles and has the chemical formula Na2Fe2+3Fe3+2Si8O22(OH)2. It crystallizes in the monoclinic system and holds a steady position among silicate species.
Identification & care
Riebeckite typically forms fibrous, asbestiform (crocidolite), acicular, massive. Its color is typically dark blue, bluish black and black. The luster is silky, vitreous, the streak is blue-gray, and specimens range from translucent to opaque. The cleavage is perfect {110}. The fracture is uneven, which aids identification.
Collector context
Collector notes
For collectors, Riebeckite is a benchmark crystalline species. Riebeckite is widely represented across Chinese provinces, including Hunan, Yunnan, Sichuan, Inner Mongolia.
Frequently asked questions
What is Riebeckite?
Riebeckite is a silicate mineral recognized among collectors for its crystal form and distribution, with known Chinese sources.
What crystal system does Riebeckite belong to?
Riebeckite crystallises in the Monoclinic crystal system.
Where is Riebeckite found?
Notable localities for Riebeckite include Bayan Obo.
References & databases
Mindat.org is the world’s largest open mineralogy database. Our descriptions are written independently and fact-checked.