![]() | near Centralia, Lewis County, Washington, USA |
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| Ca(Mg,Fe)Si2O6 - Occurs as euhedral phenocrysts to 1 ", most about 1/2" in length. Most crystals show perfect monoclinic symmetry. Some are twinned on {100} |
![]() AUGITE phenocryst in matrix |
![]() AUGITE phenocrysts |
![]() AUGITE, zoned and twinned phenocryst |