How many diamonds are left in the world?

Excuse me, but I was wondering about a curious matter regarding diamonds. Do we have any estimate of how many diamonds are still left in the world? I've always been fascinated by the rarity and beauty of these precious stones, and I'm curious to know if there's a limit to their availability. Are we running out, or are there still vast reserves waiting to be discovered? I'd appreciate any insights you might have on this topic.