Black knobby opal rub/rough of Lightning Ridge 3.75cts Bright Blues colours to exposed face 21x12x4mm Lot B4-A274 wk_end_auction Grade A to B —

Grade A to B — bright hints already visible

or keep as a specimen—this opal is ready to shine

Place your bids now on Lot B4-A028 and explore the untapped potential of this striking opal rough

Mintabie Potch & Some Bits of Colour – 275

🔥 Gamble Grade A–B (Gamble)Strong bar visible through top

Black knobby opal rub/rough of Lightning Ridge 3.75cts Bright Blues colours to exposed face 21x12x4mm Lot B4-A274 wk_end_auction Grade A to B —Auction Listing for Bid 4. com Lot Title: Lightning Ridge Black Knobby Opal Rub Rough 3. 75cts Bright Blue Colours to Exposed Face Lot Number: B4 A274 Details: Origin: Lightning Ridge, Australia Type: Black Knobby Opal Rub Rough Carat Weight: 3. 75cts Size: 21x12x4mm Features: Bright Blue colours showing on the exposed face. Description: This 3. 75ct black knobby opal rub rough from Lightning Ridge offers a lovely display of Bright Blue colours on its