Purpura Pawn
From Tardis Wiki, the free Doctor Who reference
The Purpura Pawn was a precious artefact. It was 67.3mm high and had a base with a diameter of 2cm. It was made out of aluminium silicate. The original feldspar was light subtle grey but from deep with rose a stippled red-brown pattern — a purpura — which was supposedly the blood of Promarch Celul XVI. (PROSE: The Purpura Pawn)
