Eulytine Locality: Schneeberg District, Erzgebirge , Saxony , Germany ( Locality at mindat.org ) Picture width 2.5 mm. Collection and photograph Christian Rewitzer — Photo: Christian Rewitzer · CC BY-SA 3.0
Eulytine
One of the rarest minerals — a bismuth silicate once called bismuth blende, its Greek name meaning 'easily fused'.
Intro adapted from Wikipedia (CC BY-SA).
Eulytine is an IMA-recognized mineral species in the silicate class, with the chemical formula Bi₄(SiO₄)₃.
It crystallizes in the cubic crystal system (space group I-43d).
Key properties: Mohs hardness 4.5; specific gravity 6.62–6.76; White or yellowish gray streak; Resinous or adamantine luster.
IMA symbol Eul, grandfathered status — known before the IMA’s founding, named in 1827.
Found in bismuth-rich hydrothermal veins.
It is found associated with Bismuth, quartz.
Its name comes from the Greek for good and dissolved, in reference to its low point of fusion.