Big and beautiful calcite from the mines of Kjørholt, Telemark, Norway.
This calcite was found 200-300 meters below sea-level, and was collected in the mid 1990s.
The speciment measures 125 x 85 x 62 mm, and the weight is 680 grams.
You will see it is grown with different layers. Best seen on the last picture from its underside, and the pictures from its backside, where you will se there is a darker core that is not transculent. The outer part of the crystal is transparent, and you will also see there are some inclusions (seen on picture number 5). I am not sure what this is, but assume it is pyrite as there are other calcites from this mine with calcite inclusions.
The crystal is close to damage free, the only thing you will see is a white nick on backside of the top (seen on the picture number 6). On picture number 5 you will also see that it got some marks, but this are natural the way the crystal has grown.
Please also watch the video to get a better vies.
The video can also be seen on https://youtu.be/WkLH5LGP7hM