Torch Fired Enamels

Finally got a photo of the stash of etched and torch-fired copper domes I made working up to my Master Muse ring tutorial. I'm really wanting to make some more of these, and I'm thinking that they're pretty enough by themselves without the silver settings.


I'm wondering if I can drill holes through some of these to make earrings or a bracelet. Anyone have experience drilling through enamel? It's pretty thin, so it might work.