Dark Base crystal knobby opal rough split 13.50cts Brights Blues in the bars to chase and explore 16x12x8mm & 16x9x9mm Lot B4-A427 wk_end_auction it offers fantastic potential for

it offers fantastic potential for a high-grade finished stone

With its natural formation and blue tones

A fantastic choice for collectors and designers looking for a high-quality opal

Lot: B4-A078Size: 13 x 9 x 6mmWeight: 4

Dark Base crystal knobby opal rough split 13.50cts Brights Blues in the bars to chase and explore 16x12x8mm & 16x9x9mm Lot B4-A427 wk_end_auction it offers fantastic potential forLot Title: Dark Base Crystal Knobby Opal Rough 13. 50cts Bright Blues in the BarsLot Number: B4 A427Weight: 13. 50 carats (total)Size: Approx. 16x12x8mm & 16x9x9mm Details: Origin: Lightning Ridge, New South WalesType: Dark Base Crystal Knobby Opal (Rough Split Pair)Body Tone: N4N6 (Dark Opal)Colour Presence: Bright blue fire visible in the barsUse: For chasing and exploring sold as gamble Description: A dark base crystal knobby opal pair showing