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Viridine

Kyanite-talc-quartz schist
Mautia Hill, Kongwa, Mpwapwa District, central Tanzania
Source: Private collection V. Schenk & N. Jöns
Photos: MMR
Comments and references:
Skeletal crystal intergrown with mica

Literature: Jöns, N. & Schenk, V. (2004), Journal of Petrology 45, 1959-1981
 
  PPL

Section orthogonal to c, b = Y ∥ pol plane
Section orthogonal to c, a = X ∥ pol plane
Section orthogonal to c, a and b in diagonal position
 
 
  +Pol

Section orthogonal to c, a and b in diagonal position
 

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  Image comments

   
Position shows colour relating to Y (max absorption)
 

Width of view   Pol orientation
 
 1 mm
   
 W-E
     

Viridine
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