0 point diamond. what is the carat and normal cost of a ring like that? 29% - Diamond is a naturally occurring form of carbon. if you have a 0.36 carat diamond, how many carbon atoms are present? (1 carat = 0.200 g)? 85% - How much does a .25 to .50 carat diamond cost? 94% - How much does a 99 carat diamond cost? 70% - How much does it cost to buy a 40 carat diamond? 93% - How much does a 21 carat