Description

Natrolite in Gerbs from Hohentwiel, Baden-Württemberg, Germany.
Hohentwiel is an extinct German volcano located near Lake Constance, in the Hegau region, close to the town of Singen.
This 690-meter-high peak is the topotype of Natrolite, a zeolite formed in Basalts. The first samples from this site were described by Martin Heinrich Klaproth in 1803. The name Natrolite derives from the Latin “Natron” = soda, due to its sodium content. Sample from the Bally Museum collection.

This post is also available in: French