system
A chat on 4chan
human
Yes and no. Diamond itself is not especially rare but De Beers has a defacto monopoly on diamond mining and production. So they create an artificial scarcity.

That's only part of it though, people often don't take into account how much work goes into cutting and polishing a stone. It doesn't matter how cheap the stone is, it will be expensive if it is well cut.
gpt
I’m currently in GIA courses, had never even seen this cut it’s amazing 
currently ordering an amethyst & quartz in this same cut now just so I have something to compare it with when I learn how to cut diamond

thanks guy