Dark green crystals of the rare mineral redledgeite from one of the only three known localities worldwide: Saranovskii Mine, Gorozavodskii, Urals Region, Russian Federation. — Photo: David Hospital · CC BY-SA 4.0
Redledgeite
Redledgeite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Ba(Ti₆Cr³⁺₂)O₁₆.
It crystallizes in the tetragonal crystal system (space group I4/m). It is a member of the Coronadite structural group.
Key properties: Mohs hardness 6.5; specific gravity 3.72; Adamantine luster; optically uniaxial.
IMA symbol Red, IMA status: approved, named in 1961.
On chrome ore from a gold deposit.
It is found associated with Chromite, chromian clinochlore, knorringite.
The name refers to the Red Ledge mine, California, USA.