Yellow Diamond

"" was first mentioned in "The Return."

Jasper & Peridot
Yellow Diamond seems to hold some sort of authority, as Jasper and Peridot needed to report to them.

Gemology
 Learn about the diamond gemstone here.


 * Diamonds are the stone of truth and victory.
 * Diamond is the transparent, gemstone-quality crystalline form of carbon and it is indeed the hardest known natural substance on earth.
 * Diamonds are typically known to be colorless or 'white', but the most common colors are yellow and brown.
 * Diamond is the official modern birthstone for April, and it is also used as an official 60 year anniversary gemstone.