Stützite Locality: Itinga , Jequitinhonha valley, Minas Gerais , Southeast Region, Brazil ( Locality at mindat.org ) Size: 6.7 x 6.2 x 3.3 cm. Taramite is a surprisingly rare member of the amphibole group in crystalline form, and this is a superb, large, radiating crystal spray. — Photo: Robert M. Lavinsky · CC BY-SA 3.0
Taramite
Taramite is an IMA-recognized mineral species in the silicate class, with the chemical formula Na(NaCa)(Mg₃Al₂)(Si₆Al₂)O₂₂(OH)₂.
It crystallizes in the monoclinic crystal system. It is a member of the Amphibole structural group.
Key properties: Mohs hardness 5–6; specific gravity 3.23–3.48; [Vitreous.] luster; optically biaxial.
IMA symbol Trm, IMA status: approved, named in 1925.
Found in sodium-metasomatized alkalic gneisses and nepheline syenite dikes; in eclogite metamorphosed to the amphibolite facies.
It is found associated with Nepheline, aegirine, oligoclase, microcline, nybÄoite.
The name is taken from the type locality, the Vali-Tarama Valley, Ukraine.