Arcos, it's an interesting shape but I'd suggest you think about where it's supposed to hang.
The bell shape might sit uncomfortably and would certainly not hang straight, having to rest against the owners chest.
Pendants are normally 'flat' or a 'drop' style for this reason.
Having said this, there will be people who do like the idea of the bell shape and will gladly wear it - everyone is different, everyone is unique.