完かん晶しょう質しつ

noun which may take the genitive case particle 'no', noun

holocrystalline

Technical term in geology and petrology describing a rock texture composed entirely of crystals, with no glassy groundmass.

• この岩がん石せきは完かん晶しょう質しつで、ガラス質しつの部ぶ分ぶんが全まったく見みられない。

  This rock is holocrystalline, with no glassy parts visible at all.