porphyritic
Por`phy*rit"ic, a. Etym: [Cf. F. porphyritique.] (Min.) Defn: Relating to, or resembling, porphyry, that is, characterized by the presence of distinct crystals, as of feldspar, quartz, or augite, in a relatively fine-grained base, often aphanitic or cryptocrystalline.