This is a book that is probably more than 20 years old. It would be pre-2000 (most likely).
It has diamond in the title (I believe). I also think of the word satellite or space station.
It has two political groups that are against each other or at least at odds with each other.
There is an arranged marriage.
The girl that is sent to be married has an operation that covers her clitoris with some type of plastic or material that keeps her from enjoying certain adult activities.
The family that she is married into removes this so that her and her husband can bond better. He is young. They are both young. Perhaps 17 to 19.
That's about all that I remember. Adult themes for sure. Political.
They end up developing feelings for each other. There's a really adult scene with oral sex.