The GIA defines Melee Diamonds as tiny single or foot flips weighing less than 1/5 carat (CT). Namun, the specific size of the rice drill varies from country to country and from trading market to trading market. The smallest rice drill size can be 0.001 karat (1/1000 of a carat). They are usually cut and ground into tiny round diamonds, which are set around the main stone or in a ring.
A cut grinding pattern with a circular girth profile, having 17 or 18 facets, depending on whether the diamond has a pointed bottom. Facets include a tabletop, eight crown facets, eight pavilion facets, and (very rarely) a pointed bottom.
A round bright cut with 57 or 58 facets, depending on whether the diamond has a pointed base. Facets include 32 crown facets, 24 pavilion facets, a tabletop, and a pointed base (common).