Board Thread:General Discussion/@comment-26325758-20150626001229/@comment-26282536-20150626011249

It's possible, and I hope it's true, but I still see one major flaw in your argument.

If a gem has an uncommon color, that color is specified (like with Yellow Diamond) Sapphires are assumed to be blue, even though sapphires come in many different colors. The Sapphire in SU is blue, so she just goes by Sapphire (as opposed to Blue Sapphire)

For these reasons, Sardonyx is probably an orange gem. There is a possibility that since most people aren't as familiar with sardonyxes as they are with sapphires they could make Sardonyx any color they want without confusing people, though.