Porphyry shell


  • Webster's Revised Unabridged Dictionary
    • Porphyry shell (Zoöl) a handsome marine gastropod shell (Oliva porphyria), having a dark red or brown polished surface, marked with light spots, like porphyry.
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In literature:

Flowers and shells on a porphyry ground were especially characteristic of Siries.
"Arts and Crafts in the Middle Ages" by Julia De Wolf Addison
The contents were a small porphyry bowl (X, 44), a shell, and some green paint.
"El Kab" by J.E. Quibell