Thomsonite

Very nice spheric, glassy crystals on matrix. Beautiful light crystals of thomsonite in a natrual geode from classic Czech locality Folknáře!

Thomsonite is one of the rarer zeolites. It forms tight acicular radiating clusters and sphericules as well as some blockier crystals that are found in the vesicles or bubbles of volcanic rock as are most other zeolites. Natrolite, another zeolite, is usually square in cross section but is otherwise difficult to distinguish from thomsonite. The color is usually colorless or white, but a few specimens have shown a lovely yellow color. Thomsonite is a rare mineral and is sought after by collectors of rare zeolite minerals.

Country Czech republic
Locality Folknare
Dimensions 5,7x4,3x2,8 cm
Weight 62.2g