We know that prices of smaller polished diamond goods, 0.30-0.99 carats, have been rising lately in response to improved demand. The rough diamonds that yield them weigh 0.60-2 carats. We also know that the increase in demand is mainly for rounds, at the expense of other shaped diamonds. Further, the demand is coming mostly from the US consumer market, which is mainly interested in HIJ color, SI-I clarity goods.