seige wrote:DO NOT take these rings to a jeweller.
The ring itself isn't made of metal, and cannot be heated and resized.
This also goes for any other magnetic rings, or any magnets at all.
(although particularly neodymium, as they have qualities similar to ceramics rather than metals).
If you heat Nd-Fe-B (neodymium type) magnets above 80 degrees celcius, they lose strength, so heating them at all is a bad idea, as is subjecting them to shock (ie. hammering or attempting to deform them), both because it decreases their magnetic field, and also because they have a tendency to chip and crack into sharp dangerous shards, along with flammable powder.
As Seige stated, do NOT take them to a jeweller. Ever. unless you really hate the jeweller, and don't want your ring back
I attempted to get one out of a plastic fridge magnet, by hitting it with a hammer. This caused it to explode with a large spark, and a shower of strange powder
