Hypidiomorphic

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Hypidiomorph ( Greek ὑπό : under; morphé : shape) in mineralogy and petrology denotes the shape of ingrown mineral grains in deep rocks such as plutonites or volcanites .

The crystals and their surfaces are only partly of their own, i.e. that is, they have been prevented from growing in their own form in some places (due to space problems).

  • hypidiomorphic crystal (thin section)

  • idiomorphic crystal in a magmatite (thin section)

  • Xenomorphic quartz (gray) in a rock next to feldspar (white) and mafic minerals (black).