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Formula: Bi4(SiO4)3
Nesosilicate (insular SiO4 groups), bismuth-bearing mineral
Specific gravity: 6.1 to 6.6
Hardness: 4½
Streak: White
Colour: Orange, orange brown to red brown, bright lime green, colourless
Environments:
At the type locality, the Schneeberg District, Saxony, Germany, eulytine is a late-stage mineral crystallising in
bismuth-rich hydrothermal quartz veins,
associated with bismuth and quartz
(HOM, Mindat).
Eulytine from Schneeberg - Image
At the Tintic Mining District, Juab County, Utah, USA, several specimens containing intergrown yellow tetrahedral
crystals of eulytine on a matrix of quartz and associated with
mixite, preisingerite and
jarosite were found on the lower dumps of the North Star mine
(MinRec 55.2.201)
Eulytine from Tintic - Image
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