Thomsonite w/ Basalt, Lake Superior, Minnesota, USA

$ 250.00

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Thomsonite in Basalt

Lake Superior, Cook County, Minnesota, USA

Ex. Brett Whitenack Collection

13.5 x 9 x 7.5 cm


Agate like water-worn pebbles of the zeolite variety thomsonite scattered throughout a basalt matrix. Several have been polished with the largest measuring almost 4.5 cm. Larger matrix specimens of this quality are becoming very difficult to acquire. 

This specimen was a recent acquisition (May 24’) out of the collection of Brett Whitenack. Brett was an active collector for 40+ years who resided in McPherson, Kansas. 



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