Imo people aren’t buying enough lab gems. Diamonds can come from all kinds of fucked up places, but lab gems can only come from laboratories. Like, they literally don’t naturally exist on earth. They can do all kinds of cool things too, like fluoresce or change color under UV light or depending on the angle that you’re viewing it at. They’re vastly superior to diamonds for jewelry purposes but they’re not very common so the only affordable ones tend to be cast-offs.