holocrystalline

/ ˌhɒləˈkrɪstəˌlaɪn /

adjective

(of igneous rocks) having only crystalline components and no glass Compare hemicrystalline

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They are holocrystalline in form and true glassy bases are rare, rendering the term diabase more appropriate than basalt.

That is, the metamorphic rocks are characteristically holocrystalline, while igneous rocks are porphyritic, or cryptocrystalline.

Some hollow trees show interiors beautifully lined with holocrystalline quartz.

It seems therefore that a holocrystalline pyroxene-garnet rock may be one source of the diamond found in blue ground.

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