Lightning Ridge Untouched Dark base Knobby rough 7.50cts Blue fires sold as gamble 13x12x9mm Lot B4-A197 wk_end_auction and the risk of low

and the risk of low yield or no visible colour is high

This huge 145-carat seam opal rough from Coober Pedy features a flat bar with blue colors waiting to be explored

Stone Capacity: 1 x 12x10mm Oval Main Stone

Carat Weight: 38

Lightning Ridge Untouched Dark base Knobby rough 7.50cts Blue fires sold as gamble 13x12x9mm Lot B4-A197 wk_end_auction and the risk of lowLightning Ridge Untouched Dark Base Knobby Opal Rough 7. 50cts Lot: B4 A197Size: 13 x 12 x 9mmWeight: 7. 50 caratsOrigin: Lightning Ridge, Australia This untouched dark base knobby opal rough from Lightning Ridge features blue fire waiting to be revealed, making it an exciting gamble stone for lapidaries and collectors. With its natural formation and strong cutting potential, this piece holds the possibility of uncovering something truly special.