diopside-hedenbergite join
Quick Summary
The diopside-hedenbergite join refers to a series of silicate minerals within the pyroxene family. Diopside is a calcium and magnesium silicate (CaMgSi₂O₆). Hedenbergite is a calcium iron silicate (CaFeSi₂O₆). These two minerals form a complete chemical replacement series, where iron atoms can substitute for magnesium atoms within the mineral's molecular structure.123
Diopside is commonly found in metamorphosed limestones and skarns, and can be cut as a gem if it has a clear, green color. Hedenbergite is often found in limestone skarns and metamorphosed iron-rich sediments. Both are members of the pyroxene group, a common family of rock-forming minerals.12
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