What i meant by "even SHE" , is she knows nothing of metals and chemistry. Shes not dumb and i hope you were not implying that. And if it was a pun on the word filament, then i salute you!
As for the advice on the engagement ring, i appreciate where you are coming from and i agree with you, suffice it to say that i know what she would like and im not going to do anything unromantic and stupid. I know what im doing.
Im not gonna make a ring and tell her , its made out of cerium and gadolinium, isnt that cooooooooooollll!!!!!!!!???? LOL
I just want something a bit different
Back on the subject, researching it some more, it does seem that all the useable metals are in fact used quite frequently in jewelery design. All the lanthanides are out as are scandium, osmium, iridium and others due to their (albeit low) toxocity. Still, dont really want her finger to fall off. So, im kind of back to square one..