Yellow Diamond

"Yellow Diamond" is a Gem who 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 her.

Trivia

 * Yellow Diamond seems to be a feared figure, which would say that they have high authority, judging by Peridot's and Lapis' reactions to Jasper mentioning her.

Gemology
Gemstone Information


 * 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.