I checked out the manga for Houseki no Kuni (Land of the Lustrous) over the weekend coz I didn't feel like waiting for the anime's second season. It gets kinda messed up and I am way into it.
Also the anime is astoundingly animated and looks absolutely gorgeous despite being done almost entirely in CG.

So hey, here's a bit of a quickie of Neptune as a gem from the show. I dunno what kind of gem s/he's supposed to be though, I'm no expert on those.