I just did this to one of my kr808s and used a natural round cut faceted quartz crystal ...Thanks MistressNomad for the inspiration!
OMG that is gorgeous! I'm into crystals, but didn't even think of using faceted quartz instead of swarovski bling. I so want to try this but I have one major concern with doing this to KR808s. My ash tips have 2 small holes in them where they meet the battery body. If I cover the end with my fingers or a rubber carto cover, the battery does't work at all, so I am thinking these holes are important. If I remove the ash tip and stick a crystal on, I'm worried it won't work anymore.
Clearly this hasn't affected your kr808, how did you get around it, or didn't your ash tip have these holes? What brand is it?