Definitions

1. noun

a type of igneous rock characterized by its distinctive appearance and the presence of porphyritic texture, in which large crystals of feldspar or other minerals are dispersed in a fine-grained groundmass.

“The architect used a porphyry stone to create a unique and durable flooring material.”

2. noun

a dark red or purple porphyry stone, often used in architecture and decorative arts.

“The cathedral’s altar was made from a stunning piece of porphyry.”