A Geoscience Digital Image Library

DescriptionDiopside is a calcium magnesium silicate. Diopside is an important rock forming mineral in several metamorphic and basic to ultra basic igneous rocks, also found in meteorites. Diopside is a part of an important solid solution series of the pyroxene group. Diopside is the magnesium rich end member of the series. Diopside has several varieties, including a chromium-rich gem variety called chrome diopside, violan is a rare blue variety found in some localities in Italy. There is also a green “cat's eye” variety that contains minute inclusions, probably of rutile, that reflect light in such a way as to produce a lively linear luminscence within the crystal. Still another variety is quite dark, with included rutile needles aligned so as to produce a 4-rayed star, hence the name star diopside. Diopside's chemical formula is CaMgSi2O6. It's name comes from the Greek dis meaning “two kinds” and opsis meaning “opinion”.
LocationCanada ▹ Ontario. Near Port Arthur.
PhotographerShannon Heinle. 2001-04-24.
CollectionUniversity of North Dakota Mineralogy Collection #1343.
Key wordsdiopside, silicate
Tech details676 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number395