Mammoth Halves 250 or less ct/lb. (552 or less ct/kg) Jr. Mammoth Halves 251-300 ct/lb. (553-662 ct/kg) Jumbo Halves 301-350 ct/lb. (663-772 ct/kg) Extra Large Halves 351-450 ct/lb. (773-992 ct/kg.) Large Halves 451-550 ct/lb. (993-1212 ct/kg.) Extra Large Pieces (9/16”-7/16” / 14.28mm-11.11mm) Large Pieces (7/16"-3/8")/(11.11mm-8.03mm) Medium Pieces (3/8”-1/4”) / (8.03mm – 6.35mm) Request Quote Small Pieces (1/4"-3/16”) / (6.35mm - 4.76mm) Midget Pieces (3/16”-1/8”) / (4.76mm - 3.17mm)