While ruby and sapphire are genderless, they identify as the same gender(or in this case, the lack there of)
They are very romantically involved and had what jasper implies to be similar to space rock sex.
They ARE homosexual in that they identify the same gender and are deeply involved.
The way jasper talks about fusion makes me think that the diamond overlords aren’t fusions. Jasper talks about fusion like it’s something disgusting. I think the diamonds are more like royalty due to the way pearl acted around rose quartz/ pink diamond
What I think it is is that when pink diamond defected, she took on the name rose quartz to put herself on the same level as her soldiers, her comrades. I say this because based on what we’ve heard about rose quartz, she doesn’t seem like the kind of person to put herself above her allies.
I think you’re trying to ask “Do all crystal gems have stars but the homeworld gems had diamonds?”
The crystal gems had a star on their uniform, yes. They all do. It was probably roses symbol during the war after she defected. Back when she was part of the home world hierarchy, she had diamonds

Pink ones in fact. because she was pink diamond, a royal from homeworld.
after she betrayed homeworld, she took on the name rose quartz to put herself on equal terms as her soldiers.
What I mean is: if I want to be your friend I will reach out. Don’t try to force yourself to be my friend.
If you ever try to use me, and trust me when is say I will know, I will call you out on it, make it very public and have every single real friend I have know.
friendship? you don’t really have to do anything. If I wanna be your friend, I will reach out to you.
But if you try too hard to be my friend or if you are only my friend to get to my more popular friends or because you want free art, I won’t just shoot you down, I will destroy your world.
you pay me a lot of money. I am willing to fake romantic feelings for a lot of money.
But most love I have is platonic and reserved for my closest friends.
There’s a lot but the most traumatic is probably my brother hanging himself.
The worst part of it was, he didn’t succeed. he was dead for a few minutes before my father brought him back but the lack of oxygen to his brain really fucked him up. My brother in mind was dead and it was someone else in his body afterwards.