What diamond carat weight represents the best value?
As indicated, the other rating criteria are well worth considering when buying a diamond. If you’re judging primarily by carat weight, the best value can usually be found with smaller diamonds. For one thing, anything above two carats is usually well beyond the means of most buyers. The difference between two and three carats can mean tens of thousands of dollars. The difference between a half carat and one carat, on the other hand, can be relatively minor, so, for many buyers, one diamond carat weight can often represent the ideal combination of size and value.