I used to work as a contractor at a number of MoD sites.
At one naval base, in the PO's mess, there was a polished turd in a glass case.
It was a shiny, plated, dried turd that had once passed through the beloved bowels of HRH Elizabeth the Queen Mother. As you know, Royalty cannot pass motions in the same facilities as the rest of us, so they require specially installed ones when they make official visits to the haunts of their subjects.
So our inventive Petty Officers had installed a Royal Poo Trap in the loo supplied for HRH's use, and had extracted and dried and mounted and POLISHED the royal turd.
It was still a turd, however.
So there.