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CaMg(SiO3)2 A white to green monoclinic pyroxene mineral which forms gray to white, short, stubby, prismatic, often equidimensional crystals. Also known as malacolite.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a rock-forming mineral, a silicate of the group of monoclinic pyroxenes. Its chemical composition is CaMg[Si2O6]; part of the Mg can be replaced by Fe2+. Gray to grayish-green in color, it has a hardness on the mineralogical scale of 5.5-6 and a density of 3,270-3,400 kg/m3. Diopside is usually encountered as irregularly shaped grains with a good cleavage in gabbro, diabase, diorite, syenite, skarn, and other igneous and metamorphic rocks. More rarely it forms large transparent green crystals (so-called baikalite).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.