Dovyrenite
Dovyrenite is an IMA-recognized mineral species in the silicate class, with the chemical formula Ca₆Zr(Si₂O₇)₂(OH)₄.
It crystallizes in the orthorhombic crystal system (space group Pnnm).
Key properties: Mohs hardness 3–4; specific gravity 3.034; White streak; Vitreous luster; optically biaxial.
IMA symbol Dov, IMA status: approved, named in 2007.
An alteration product of Zr-bearing and zirconium minerals in veins of vesuvianite- foshagite skarn in carbonate xenoliths in a subvolcanic layered gabbro-peridotite massif.
It is found associated with Fassaitic pyroxene, perovskite, hydrogarnets, monticellite, vesuvianite, diopside, foshagite, brucite, calzirtite, tazheranite, baghdadite, apatite, calcite.
The name commemorates the name of the locality Dovyren Bald Mountain, Russia.