I read the other day that jewelers use a "water test" as one of the surest ways to identify a true diamond. An imitation stone is never as brilliant as a genuine stone, but sometimes the difference can’t be determined with the unaided eye. Jewelers know that a genuine diamond placed in water sparkles brilliantly, whereas the sparkle of the imitation is practically extinguished. And the trials that we experience go a long way in showing the genuine sparkle of our character.