Lightning Ridge Blue on Black knobby opal rough to cut 13.50cts Lovely Royal blues 21x17x5mm B4-A168 wk_auction A mix of sizes and

A mix of sizes and shapes gives flexibility for cutters aiming to pull clean face stones or freeforms

Good dome potential with colour showing — just needs a skilled hand to unlock the gem

Lot Title#Grade B Cutter’s Gamble – Green/Blue Fire on Dark Base Knobby Piece (Lightning Ridge)

Lot: B4-A255Size: 19 x 12 x 8mmTotal Weight: 10

Best suited for beginners

Lightning Ridge Blue on Black knobby opal rough to cut 13.50cts Lovely Royal blues 21x17x5mm B4-A168 wk_auction A mix of sizes andLightning Ridge Blue on Black Knobby Opal Rough 13. 50cts Lot: B4 A168Size: 21 x 17 x 5mmWeight: 13. 50 caratsOrigin: Lightning Ridge, Australia This blue on black knobby opal rough from Lightning Ridge features lovely royal blue fire, making it an excellent choice for cutting. With its dark base enhancing the depth of color, this opal has strong potential to reveal a striking finished gemstone. Natural & Untreated Lovely Royal Blue Fire on Black Base