Diopside and hedenbergite form a complete solid solution series with physical and optical properties varying linearly with composition. Cleavage is virtually nonexistent, however, index of refraction and 2V point to augite. Sample is augite plus a moderate amount of dolomite. Sample subsequently treated with warm HCl to remove dolomite. First Edition, U.S. Geological Survey Open File Report 87-263.
Microprobe analysis shows the sample to be homogenous within and between grains.
It has relatively high aluminum, iron and soda, and low calcium. Analysis indicates WO34, EN45, FS21 composition. Cleavage is virtually nonexistent, however, index of refraction and 2V point to augite.