Thomsonite Nodule on Matrix
Collection
John Betts - Fine Minerals
Description
Polished
30 mm
nodule
of Thomsonite in gray
basalt
matrix
. The Thomsonite has circular, bulls-eye patterns.
Locality
Grand Marais, north shore of Lake Superior, Minnesota
Dimensions
6.0 x 5.0 x 2.5 cm.
Photograph
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