This set of stackable bands exhibits yet another exquisite gem in the sapphire family! The yellow sapphire, which was once a lesser known type of the traditionally used blue gem stones, has carved a niche for itself in gorgeous jewelry like this stackable eternity ring trio. One of many reasons these beautiful yellow sapphire stackable ring styles are taking off so drastically is the sunny gem's likeness to elusive canary diamonds. While a stackable rings set featuring numerous canary diamonds would be too expensive for many people, the yellow sapphire presents an equally gorgeous but much less expensive option.