ID 20254
Beautiful and big calcite from the mines of Kjørholt, Breivik, Telemark, Norway.
This calcite was found 200-300 meters below sea-level, and was collected in the early/mid 1990s.

The speciment measures 53 x 68 x 56 mm, and the weight is 238 grams.
 
It is partly translucent. Unfortunately it got a couple of nicks, but anyway it is a great piece.