porphyry

The story

1. Ancient Greek · derived fromπορφυρίτης λίθος“purple stone”
2. Old French · derived fromporfire
3. English todayporphyry

From Old French porfire, from Ancient Greek πορφυρίτης λίθος (porphurítēs líthos, “purple stone”), from πορφύρα (porphúra, “purple-fish, purple dye”).