Gimmel rings, a. Gimmal ring, are two rings that intertwine or fit together. Jackie Kennedy as well as the Duchess of Windsor proudly showed the planet their emerald engagement rings. No wander that of them want nothing less than the perfect ring.
That is why it is rarer when compared to a diamond. During the wedding, the three rings are joined together to become one. Their lighter colored counterparts are referred to as green beryl. Bigger is Better.