This small gemstone makes its owner more resistant to the effects of time wasting, entrapment and trickery by focusing the bearers mind on the essentials of escaping any situation which would otherwise confuse people.
The Timesink Emerald of Focus is the Gem to help the character avoid those rather nasty AP wasting traps.
It is not guaranteed to work; instead after being "caught" by the trap, a second roll is made. For this second roll, you have a 10% chance to avoid losing AP to a trap. Note that the Emerald has no effect upon traps that do not affect your AP.