Can a tantalum ring be cut off?
Tantalum rings can be cut off easily with a normal ring cutter that most jewellers and emergency departments will have the equipment. Tantalum is very similar to platinum when removing, so if you just advise the person removing the ring they will have an idea of how to attempt it.
Can tungsten rings be cut off?
Even though they can't be cut off, they don't require something like a diamond saw to remove. In fact, the most common method of removing tungsten rings from your finger is by using a simple pair of vice grips, which apply enough pressure that the tungsten ring fractures safely.