Dark Base knobby opal rough 8.50cts showing some blues colours to chase 18x12x7mm Lot B4-A248 wk_end_auction 80ct rough seam opal from

80ct rough seam opal from Coober Pedy shows dominant blue tones with flickers of multicolour fire across the surface

It’s a fantastic lot for those looking to cut opal with clear colour bars

Perfect size and shape for small cutters

but no guarantees

Dark Base knobby opal rough 8.50cts showing some blues colours to chase 18x12x7mm Lot B4-A248 wk_end_auction 80ct rough seam opal fromDark Base Knobby Opal Rough 8. 50cts Lightning Ridge Lot: B4 A248Size: 18 x 12 x 7mmTotal Weight: 8. 50 caratsOrigin: Lightning Ridge, Australia This dark base knobby opal rough from Lightning Ridge is showing some blue colors ready to be chased, making it a great piece for cutting or exploring. With its deep base tone providing excellent contrast, this opal holds exciting potential for lapidaries looking for hidden fire. Natural & Untouched Blues