| 12hhgang ((THOMSONITE in BASALT)), $10 MINIMUM BID, Thomsonite Beach, Grand Marais, Cook County, Minnesota, 10 x 5.5 x 5 cm, Cabinet | |
 | Here is a specimen of Thomsonite from Minnesota. This is a famous occurrence for these zeolite nodules in Basalt. These are These are highly thought of by the local Minnesota mineral collectors. |
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