Big Black/Dark Knobby of Lightning Ridge 34.50cts some blue colours showing 26x22x16mm Lot B4-A130 wk_end_auction 40ct Coober Pedy opal doublet

40ct Coober Pedy opal doublet features a gem-quality crystal opal expertly mounted on a boulder backing

Features:Bright Blue centre exposed with a unique knobby shape

AustraliaType: Crystal on Dark/Black Base SeamUse: Carving / Gamble CuttingColour: Mixed hues (crystal with potential fire)

⚠️ Cutter Grade BZone of colour visible – moderate risk

solid chunk of rough seam opal

Big Black/Dark Knobby of Lightning Ridge 34.50cts some blue colours showing 26x22x16mm Lot B4-A130 wk_end_auction 40ct Coober Pedy opal doubletBig Black Dark Knobby Opal Rough 34. 50cts Lot: B4 A130Size: 26 x 22 x 16mmWeight: 34. 50 caratsOrigin: Lightning Ridge, Australia This big black dark knobby opal rough from Lightning Ridge features some blue colors showing, making it an interesting piece for lapidaries and collectors. With its deep base and natural formation, this opal presents a great opportunity for cutting and exploration. Natural & Untreated Some Blue Color Visible Authentic