Calcite var. Iceland Spar
Collection
John Betts - Fine Minerals
Description
Transparent
cleavage fragment
of colorless Calcite variety
Iceland Spar
. The
double refraction
is clearly apparent in the blurry lines. Ex. Peter B. Nalle (1923-2010) collection #176; originally acquired in 1933.
Locality
Helgustadir Mine, Eskifjord, Iceland
Dimensions
22 x 22 x 16 mm.
Photograph
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