[Dia winces slightly at the idea of the gems being used in decoration and such, but--] Ah, yes... It works like that here, doesn't it?

I'm the only sentient pure-diamond where I'm from, though there are others like Yellow Diamond, and those not in the diamond-class, like Jade, Ghost Quartz, Rutile... [They make an 'etc' hand motion]

However, I haven't seen anything like that here either, or heard of anything like it from other worlds... I guess that makes my home pretty unique!