Untouched Knobby opal formation rough of Lightning Ridge 21.20cts Crystal on Black base with Blues & greens 31x21x10mm Lot B4-A727 ToClear making this a fun parcel

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

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

Large size seam split pair

Type: Dark Amber Knobby Opal Rough (Split Pair)

yet still holds plenty of potential for further shaping or refining

Untouched Knobby opal formation rough of Lightning Ridge 21.20cts Crystal on Black base with Blues & greens 31x21x10mm Lot B4-A727 ToClear making this a fun parcelLot 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