Big Black/Dark Knobby of Lightning Ridge 34.50cts some blue colours showing 26x22x16mm Lot B4-A130 wk_end_auction

Big Black/Dark Knobby of Lightning Ridge 34.50cts some blue colours showing 26x22x16mm Lot B4-A130 wk_end_auctionBig 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

Dimensions: 25x19x11mm

⚠️ Cutter Grade BZone of colour visible – moderate risk

Features:Bright Blue centre exposed with a unique knobby shape

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

A natural Australian opal with beautiful fire

solid chunk of rough seam opal

⚠️ Gamble Grade A–B (Gamble)Strong bar visible

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

Lot Title: Coober Pedy Crystal Opal Doublet – 0

high to full risk – mostly potch with a few small flashes to chase

making it an exciting choice for cutting or collecting

Grade C — some visible colour but still a gamble if cutting is attempted