Stabilized Hubei Turquoise no backing.
#1 cabochon is 22 cts. ( 27.28 mm long X 20.04 mm wide )
#2 cabochon is 24.5 cts. ( 26.50 mm long X 20 mm wide )
#3 cabochon is 23.5 cts. ( 29.06 mm long X 18.59 mm wide )
#4 cabochon is 23 cts. ( 26.89 mm long X 23.18 mm wide )