Nautilus shell collection - choose from 2 finishes -- 4 shells in a set

these are from my friends in the Philippines who have been creating shell beauties for decades.

i only have a few of these sets of 4 shells in a range of sizes.
 
the usual "tiger stripe" natural outer coating has been polished away to reveal the natural silver nacre of the shell. to one set of shells, carved grooves have been added (so cool, right?!)

choose either: polished nacre or carved ridges - each set have 4 shells of graduated sizes, like shown