Moonstone Fanfusion - Lapis Lazuli and Pearl | Steven Universe | Know Your Meme
Gem Math - hellosaur this art is adorable
Crystal Gems Fusions in Bloom: Opal, Sugilite, Sardonyx and Rainbow Quartz.
I don't think she has the third eye because of not fusing completely together but because it's the future vision eye and is unlike a regular seeing eye. Still, good theory!