Porphyrite :: Porphyrite (n.) A rock with a porphyritic structure; as, augite porphyrite..
Porphyritic :: Porphyritic (a.) 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..