This was a really cool project! The client sent me a very nice opal triplet and a plain silver zippo case. After discussing a few themes we developed a custom steampunk/grunge style wrap for the case, which I fabricated and then sodered directly to the original case. It included some cz's, black spinel and a few blue sapphires. The case remained functional; being able to open and shut and once the client recieved it back, he was able to slip the original lighter core back in and use it.
A short vide of the case can be seen here: