Stunning Bright Blue Crystal bar on Dark base knobby opal rough 7.50cts Flat bar highly visible to cut & Polish 20x15x6mm Lot B4-A478 wk_end_auction 🎲 Gamble Grade C (Gamble)Some

🎲 Gamble Grade C (Gamble)Some colour hints visible

Perfect for cabbing or carving into a small high-grade gem

A solid choice for cutters confident in navigating fine seams and chasing vibrant blue colour across uneven forms

This dark base knobby opal split from Lightning Ridge showcases blue colors already showing

Lot Title#Grade C–D Gamble – Knobby Seam & Fossil Rough Parcel (Lightning Ridge)

Stunning Bright Blue Crystal bar on Dark base knobby opal rough 7.50cts Flat bar highly visible to cut & Polish 20x15x6mm Lot B4-A478 wk_end_auction 🎲 Gamble Grade C (Gamble)SomeAuction Listing for Bid 4. com Lot Title: Stunning Bright Blue Crystal Bar on Dark Base Knobby Opal Rough 7. 50cts Lot Number: B4 A478 Details: Origin: Lightning Ridge, Australia Type: Dark Base Knobby Opal Rough Carat Weight: 7. 50cts Size: 20x15x6mm Features: Bright, visible blue crystal bar running through the piece, ready to cut and polish Description: This stunning piece of Lightning Ridge opal rough showcases a vivid blue crystal bar that is