[Krystyna]

   
https://en.wikipedia.org/wiki/Porphyry_(...aparte.jpg
Sarcophagus of Napoleon in Les Invalides, Paris, made of quartzite with a pedestal of green porphyry

   
https://en.wikipedia.org/wiki/Porphyry_(...ington.jpg
Wellington's sarcophagus in the crypt of St Paul's in London made from a single block of luxullianite porphyry
https://en.wikipedia.org/wiki/Porphyry_(geology)