Eulytine

eulytine

nesosilicate

quartz

bismuth

Images
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:

Hydrothermal 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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