Coober Pedy Crystal Seam opal rough 16.75cts Flat bar showing blue fires to cut 21x19x8mm Lot B4-A086 Up&coming ⚠️ Gamble Grade A–B (Gamble)Strong

⚠️ Gamble Grade A–B (Gamble)Strong blue bars present

❓ Gamble Grade C–D (Gamble)Some multicolour flashes in places

50ct seam opal from Lightning Ridge features a bright blue bar running across a classic black base

though structure and depth of bar may vary

A small inclusion is present on the face but can be worked around with careful planning

Coober Pedy Crystal Seam opal rough 16.75cts Flat bar showing blue fires to cut 21x19x8mm Lot B4-A086 Up&coming ⚠️ Gamble Grade A–B (Gamble)StrongLot Title: Coober Pedy Crystal Seam Opal Rough 16. 75cts, Flat Bar Showing Blue Fires to CutLot Number: B4 A086Weight: 16. 75 caratsDimensions: 21 x 19 x 8 mm Details: Origin: Coober Pedy, South AustraliaType: Crystal Seam Opal (Rough)Body Tone: Light crystalPlay of Colour: Blue fire in a flat barForm: Blocky piece with exposed face lineUse: Cutting and polishing Description: This 16. 75ct Coober Pedy crystal seam opal rough displays a flat bar with