bid4opal
Dark Base Seam opal Rough 8.50cts One side showing lots of Blues small zone of greens on the other Lightning Ridge gamble Cut 23x14x6mm to come Lot B4-A499
B4-A499
Delivery Info
UK: 2-3 days; International: 7-14 days
Auction Listing for Bid-4.com
Lot Title: Dark Base Seam Opal Rough – 8.50cts
Lot Number: B4-A499
Details:
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Origin: Lightning Ridge, Australia
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Type: Dark Base Seam Opal Rough
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Carat Weight: 8.50cts total
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Size: 23x14x6mm
Features:
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One side showing lots of blue colours
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Small zone of greens visible on the other side
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Ideal for gamble cutting or exploration
Description: This 8.50ct piece of Dark Base Seam opal rough from Lightning Ridge features bright blue colours visible on one side and a small zone of greens on the other side. With its manageable size, this rough offers great potential for those looking for an opal with visible colours to work with. Grade B to C due to visible colours with some inconsistencies and inclusions to work around. It’s ideal for those looking to explore or gamble a bit for a potential gem.
🎲 Grade B to C (Gamble)
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Some visible colour hints, moderate risk with potential.
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Requires careful cutting with some inclusions and less predictable consistency.
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Great for collectors or cutters seeking an exciting challenge.
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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