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105 mm Thomsonite, Diopside and Grossular
$69.99
ID20322
Location:
Bumannsfjorden, Seiland, Finnmark, Norway
Size: 60x105x55 mm (313 grams)
Description
Combination light pink Thomsonite pseudomorph, green Diopside and some small Grossular. Also some areas white calcite (not crystallized).
One side of the specimen is crystallized Thomsonite, mostly undamaged but some black spots.
The other side is a combination of green Diopside ancola-brown Grossular, this side has some damages to the crystals (see pictures)
Thomsonite pseudomorph
It is a very rare combination, and my father found just a few ones like this. I have now got it proven by a lab that it is in fact Thomsonite. You can also see the mineral listed at Seiland at Mindat: https://www.mindat.org/loc-341193.html
In mineralogy, a pseudomorph is a mineral or mineral compound that appears in an atypical form (crystal system), resulting from a substitution process in which the appearance and dimensions remain constant, but the original mineral is replaced by another.
Bumannsfjorden, Seiland, Finnmark, Norway
Most of the year the field where the minerals are found is covered with ice and snow, and today this area is now a part of the Seiland National Park, and collecting from this area is now strictly forbidden. So not only is this a rare material but also it will not be collected more of it.
This specimen was found in the late 1980's by my father, Gunnar Mathisen.
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