porphyritic

Of or containing porphyry.

Containing relatively large isolated crystals in a mass of fine texture.

Containing or resembling porphyry; composed of a compact homogeneous rock in which distinct crystals or grains of feldspar or some other minerals are embedded.

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.

Of or pertaining to porphyry.