If you wish to avoid the potential hassle of diamonds falling off or loosening, then it is best to choose pearl diamond rings that are set in a prong setting. The mountings in these diamond ring settings will offer greater protection to the center stones and prevent them from loosening.     It is true that prong diamond ring settings are actually a lot safer when compared to other settings. However, if any heavy objects get hit on the ring, then there is a chance for the diamond to fall out of the setting. This is because the prongs in prong diamond ring setting do not exert too much pressure on the center stone, but if you take good care of these rings, you will be able to use them for a greater period. Remember, refashioning the setting of pearl diamond rings is extremely hard and quite expensive.