122 - IGL Certified and Slabbed 4.35 Carat Oval Natural Australian Black Opal Measuring 16.62mm x 11.13mm x 3.51mm. Original IGL Report 34402, Dated 6/16/1987 to Accompany this Lot. The IGL Cert. Reports Very Good Color and Medium Tone with Blue as the Dominant Color. Shipping $28.00 (estimate $1,500-$2,500)