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Corundum

Corundum-fuchsite rock (corundum, mica, rutile)
Coorg terrane, Karnataka, India
Source: Thin section collection M.M. Raith
Photos: MMR
Comments and references:
  
  PPL

Variable crystal orientations (A)
Section ∥ c, c ∥ pol plane (B)
Section ∥ c, c orthogonal to pol plane (B)
Section orthogonal to c (C)
 
 
  +Pol

Variable crystal orientations (A)
Variable crystal orientations, +1λ (A)
Section ∥ c, c ∥ pol plane (ext position) (B)
Section ∥ c, diagonal position (max Δn) (B)
Section ∥ c, diagonal position, + 1λ (B)
Section ∥ c, diagonal position, + 1λ; 90° rotation from previous position (B)
Section orthogonal to c (isotropic section) (C)
 

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Width of view   Pol orientation
 
 4 mm
   
 W-E
     

Corundum
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