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Image: Blue diopsidite skarn Buryatia Republic, Transbaikalia, eastern Siberia

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Description: Blue diopsidite skarn (tumble-polished specimen) from the Neoproterozoic of the Dovyren Highlands, eastern Siberia, Russia. Skarn is a coarsely-crystalline, contact metamorphic rock. The attractive rock shown here is a rare variety of skarn dominated by bluish-colored diopside pyroxene (“violane” or “violan”) ((Ca,Mg,Fe)₂Si₂O₆). Such rocks are called diopsidite skarn. Geologic origin & context & age: magnesium skarn formed by metamorphism of dolostone xenoliths by a gabbro-peridotite layered intrusion, Yoko-Dovyrensky Massif, Neoproterozoic, ~700 Ma. Locality: Dovyren Highlands, Buryatia Republic, Transbaikalia, eastern Siberia, Russia.
Title: Blue diopsidite skarn Buryatia Republic, Transbaikalia, eastern Siberia
Credit: Blue diopsidite skarn (Neoproterozoic, about 700 Ma; Dovyren Highlands, Buryatia Republic, Transbaikalia, eastern Siberia, Russia) 1
Author: James St. John
Usage Terms: Creative Commons Attribution 2.0
License: CC BY 2.0
License Link: https://creativecommons.org/licenses/by/2.0
Attribution Required?: Yes

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