how to bring back the shine to a conch shell

[carolynhep]

i really need help. we brought back a beautiful conch back from the B.V.I'S with the "meat" out of it. it still had a smell and we were told to soak it in fresh water for 30 days. we did, but now the shine is completely gone from the shell. we tried putting paraine oil on it, but the shine only stays until the oil dries. have we ruined out shell for good??? is there a way of bringing back the shine? HELP PLEASE.
shineless in british columbia