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Thomsonite Crystals and Mineral Specimens

Byminerals

Thomsonite is a tectosilicate mineral belonging to the zeolite group. The name is in honor of Thomson, a professor of mineral chemistry at the University of Glasgow. He has contributed greatly to the number of chemical analyzes of minerals throughout his career. And discovered many new mineral species. Thomsonite is a hydrated calcium silicate. Its pinkish-gray patterns are very rare. Sometimes misunderstood as a jade.

The zeolite subcommittee of the International Mineral Association divided Thomsonite into two individual subspecies. Then it became a series of two members. The series is defined by calcium and strontium end members. Calcium-dominated common thomsonite is called thomsonite-CA. Thomsonite, which is dominated by strontium, is called thomsonite-senior, which is very rare. Almost all Thomsonite specimens are Thomsonite-CA.

Thomsonite with a strong content was recently discovered on Mount Yuxpor in the Khibini Massif on the Kola Peninsula in Russia. This form is most famous on Thomsonite Beach in Grand Marais, Minnesota, on the shores of Lake Superior. In the U.S., the Upper and Lower New Street Quarries in New Jersey found the best Thomsonite aggregates, such as Patterson and the Psalm Company, often radiating masses like mushrooms.

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