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bid4opal

21.00cts rub/rough boulder opal from Winton Bright electric vein of Greens & blues to cut a polish 20x18x6mm Lot B4-A547

B4-A547

£20.00

Delivery Info

UK: 2-3 days; International: 7-14 days

Lot Title: Bright Electric Vein – Winton Boulder Opal Rub/Rough – 21.00cts
Lot Number: B4-A547
Details: 20x18x6 mm – Winton, QLD – Boulder Opal
Description:
Solid Winton boulder opal rough with a vibrant electric vein of green and blue fire running through the ironstone. Already rubbed and pre-shaped — just needs a fine-tuned finish and polish. Clear colour face showing with good structure underneath. Great cutting potential with low to moderate risk.

⚠️ Gamble Grade A–B (Gamble)
Strong colour showing with promising structure – low to moderate risk


Grade Key
Grade     Description
🔥 A+   Clear visible colour bar, low-risk cut, high gem potential
🔥 A    Strong face showing, low to medium risk, good cutting yield
⚠️ B    Colour visible, moderate risk, requires careful cutting
🎲 C (Gamble) Some colour hints, unknown depth/consistency, high risk
❓ D (Blind Gamble) No visible colour, full risk – mystery piece



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