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Zoisite

Manganiferous quartzitic rock (thulite, phengite, quartz)
Apikia, Andros Island, Cyclades, Greece
Source: Thin section collection Thomas Reinecke
Photos: MMR
Comments and references:
T. Reinecke (1983), Mineralogie und Petrologie der mangan- und eisenreichen Metasedimente von Andros / Kykladen / Griechenland. PhD thesis, Univ. Braunschweig.
 
  PPL

Variable crystal orientations, mostly elongate sections (A)
Variable crystal orientations (A); 90° rotation from previous position
Elongate crystals in diagonal position (A)
Variable crystal orientations (B)
Variable crystal orientations, 90° rotation from previous position (B)
Variable crystal orientations, some crystals close to diagonal position (B)
 
 
  +Pol

Elongate crystals in diagonal position (A)
Elongate crystals in diagonal position, +1λ (A)
Variable crystal orientations, some crystals close to diagonal position (B)
Variable crystal orientations, some crystals close to diagonal position, +1λ (B)
 

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Width of view   Pol orientation
 
 1 mm
   
 W-E
     

Zoisite
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