Blue on Black Knobby opal rub/rough 8.70cts Lightning Ridge Blues some work then polish 16x12x8mm Lot B4-A716 wk_end_auction A true cutter’s gem with

A true cutter’s gem with minimal risk

but bar depth and quality are uncertain

moderate risk – chase and polish through dark seam

00cts – Lightning Ridge – Mixed FormationDescription:Mixed parcel of knobby

Blue on Black Knobby opal rub/rough 8.70cts Lightning Ridge Blues some work then polish 16x12x8mm Lot B4-A716 wk_end_auction A true cutter’s gem withLot Title: Lightning Ridge Knobby Opal Rub Rough 8. 70cts Blue on Black Grade A to B CutterLot Number: B4 A716Details: 16x12x8 mm 8. 70cts Lightning Ridge Knobby Opal Rub RoughDescription: Blue on Black knobby opal rub rough weighing 8. 70cts with bold blue fires already showing. This piece has had the initial prep work done just needs shaping, refining, and a final polish. Ideal for a cutter looking to finish off a classy stone with that classic