For metal-sensitive wearers, palladium-alloyed 14kt white gold is the widely recommended choice: palladium is far less reactive than the nickel-based alloys used in some white gold compositions.
A Storied Heritage
The emerald cut was named for the stone it was designed to serve, its rectangular step-cut geometry developed to reduce stress on the crystal during cutting and maximize color depth, two problems specific to emerald whose solution proved so effective that it was subsequently applied to diamonds and every other gemstone.