Ring-removal is a dreaded problem in pediatric hand and finger injuries.  Removal can be difficult and time consuming.  The relatively recent introduction of Tungsten into the jewelry market has further complicated this problem:

• The hardest metal used in jewelry - cannot be scratched, much less cut, by common tools
• Cheap, easy to buy online, attractive to adolescents

However, it is:

• Extremely brittle
• May be safely and quickly broken with locking pliers (also cheap), by sequentially, gradually tightening the locking plier grip

This video explains how.  Of course, this works on adults as well.

http://www.youtube.com/watch?v=poM423pewRE

_{I have no relationship with the copany which made this video - it was simply chosen for its clear explanation of the solution described in this pearl.}