Untouched Knobby opal formation rough of Lightning Ridge 21.20cts Crystal on Black base with Blues & greens 31x21x10mm Lot B4-A727 ToClear yet still holds plenty of

yet still holds plenty of potential for further shaping or refining

Carat Weight: 2

50cts with Bright & Stunning Greens & Blues to Chase & Polish

this opal is a perfect addition to any collection or custom design

making this a fun parcel for explorers and tinkerers — but not sold as cutters rough

Untouched Knobby opal formation rough of Lightning Ridge 21.20cts Crystal on Black base with Blues & greens 31x21x10mm Lot B4-A727 ToClear yet still holds plenty ofLot TitleCrystal on Black Base Knobby Lightning Ridge Rough with Blues & Greens Lot NumberB4 A727 DetailsWeight: 21. 20 ctSize: 31 x 21 x 10 mmOrigin: Lightning Ridge, AustraliaType: Knobby Opal FormationUse: Carving Gamble CuttingColour: Blues & greens DescriptionUntouched knobby opal formation from Lightning Ridge featuring crystal cap on a black base. Flashes of blue and green appear through the skin in several spots, with strong contrast expected