Lot 4 loose opal belemnites , comprised of: 1 x approx. 32.2 ct, approx. 57.6 x 9.9 x 9.6 mm, 1 x approx. 24.5 ct, approx. 52.4 x 9.7 x 8.8 mm, 1 x approx. 12.4 ct, approx. 31.1 x 10.4 x 7.6 mm, 1 x approx. 23.6 ct, approx. 56x 9.3 x 7.8 mm, play of colours predominant inBlue and Green