Tremolite Schist
“White amphibole in a foliated frame”
Tremolite schist is a metamorphic rock rich in the calcium-magnesium amphibole tremolite, which forms long, white to pale green prismatic crystals in a foliated matrix. It develops from the metamorphism of siliceous dolomites or magnesium-rich sediments at moderate temperatures.
tremolite, talc, calcite, dolomite, quartz, chlorite
Tremola Valley (Switzerland — type locality), Gouverneur (New York, USA), Ontario (Canada), Zillertal Alps (Austria), Mogok (Myanmar)
5-6
Tremolite is named after the Tremola Valley at St. Gotthard Pass in Switzerland — the same alpine crossing used by traders and armies for over 2,000 years.
Test Your Knowledge
What is the geological significance of the Tremola Valley, after which tremolite is named?
Photo Attribution
Title: Tremolite schist (Precambrian; St. Lawrence County, New York State, USA) (41513935364).jpg
Author: James St. John
License: CC BY 2.0
Related Specimens
Want to identify rocks yourself?