Ah, it is made of Palladium 950. She didn't quite like the gold color of gold, and wanted a white shiny ring. Since white gold is mostly grey and need to be plated I figured we should go all the way and make it from Palladium instead. There will be a wedding ring cast as well (these are engagement rings (old Swedish tradition)) later, also in Palladium.

There is no way I could have soldered it at home, I don't have the equipment for it.
I am not entirely sure my landlord would like me to store hydrogen or acetylene bottles in my apartment.

Plus, wire + solder + equipment would cost a lot more than having it cast.

/Andreas