What is the difference between an apostle ring and a bishop ring?

The difference between a bishop's ring and an Apostle's ring is the gym stone. The stone usually used for a bishop is amethyst and amethyst -like stone ( deep royal purple). On the other hand, the most common stone used in an Apostle's ring is the precious Ruby ( deep crimson ready. This dose not mean that either Office is confined to either stone as we understand that it is the spiritual consecration , dedication, and anointing of the individuals wearing these rings that matters most.