Alright, this is an issue that bothers me deeply and y'all gonna listen here.
Some (actually many) people, including myself, make male, male presenting, and neutral presenting gem OCs. In a show where all gems are female presenting, save for Steven, why do we do this? Well, here's some talking points.
Ian JQ is someone who used to work on SU. His word here is as good as anything.
But I won't stop there, here's some other reasons why this stuff is OK and people really should not get their panties in a bunch over male/neutral gems.
Consider this, many of the fans of SU are people in the LGBT community. Many of the fans are trans males and non-binary people, they should be allowed to portray themselves on their OCs. If you say that gems can only be female/female presenting, it is harmful to them.
People like to say things like "well most other shows have a mostly male cast, why can't girls just have this?" But