Chrome Diopside on Calcite | raw green crystal cluster, natural mineral specimenGreen diopside on calcite from Afghanistan is a notable skarn mineral association, typically found in contact zones where intruding magmas have altered limestone or dolomite host rocks. In Afghan localities, green diopside forms as well developed prismatic crystals, often rich in iron or chromium, giving them a vibrant green hue. These crystals are frequently hosted on or embedded in white calcite, creating a visually contrasting and collectible