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Description

Melanophlogite Pseudomorph on Blue Chalcedony
Namibia

An uncommon and visually intriguing specimen, this piece features intergrown cubic forms of Blue Chalcedony that have pseudomorphed after Melanophlogite-a rare Silica polymorph known for forming delicate, cage-like cubic crystals. The subtle blue tones of the Chalcedony provide a soft, translucent base, while a contrasting white overgrowth highlights the original cubic structure and enhances visual depth. Such pseudomorphic replacements are highly sought after for their unusual crystallography and aesthetic appeal, especially when preserved in this level of detail. A fine specimen for collectors of silica minerals and mineralogical curiosities.
Measurements: 3.98 x 3.00 x 2.00 inches (10.10 x 7.62 x 5.08 cm)

Provenance: Property of a Distinguished Southern California Collector


More Information: All items are offered "as is." While every effort has been made to accurately describe each lot, certain pieces—particularly fossils, minerals, and carvings—may exhibit minor imperfections, repairs, restorations, or natural wear consistent with age, excavation, or handling. Prospective buyers are encouraged to carefully review photographs and descriptions and to request additional condition information prior to bidding.


Estimate: $400 - up.

Condition Report*: Condition report available upon request.
*Heritage Auctions strives to provide as much information as possible but encourages in-person inspection by bidders. Statements regarding the condition of objects are only for general guidance and should not be relied upon as complete statements of fact, and do not constitute a representation, warranty or assumption of liability by Heritage. Some condition issues may not be noted in the condition report but are apparent in the provided photos which are considered part of the condition report. Please note that we do not de-frame lots estimated at $1,000 or less and may not be able to provide additional details for lots valued under $500. Heritage does not guarantee the condition of frames and shall not be liable for any damage/scratches to frames, glass/acrylic coverings, original boxes, display accessories, or art that has slipped in frames. All lots are sold "AS IS" under the Terms & Conditions of Auction.

Auction Info

Proxy Bidding Ends 
December
2nd Tuesday 3:50 pm CT
Auction Dates
December
2nd Tuesday
Proxy Bidding Time Remaining 
24 Days 19h 41m 36s
Bids + Registered Phone Bidders: 2
Lot Tracking Activity: 7
Page Views: 53

Buyer's Premium per Lot:
25% of the successful bid (minimum $49) per lot.

This lot is in: 2 - Signature® Internet Session - No Floor or Phone Bidding (Mail, Fax, Internet, and Heritage Live):
(Lots 72188-72346) - 4:00 PM Central Time, Tuesday, December 2, 2025.
[Proxy bidding ends ten minutes prior to the session start time. Live Proxy bidding on Heritage Live now starts within 2 hours of when the auction opens for proxy bidding and continues through the live session.]

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Additional Location Info:
Heritage Auctions
2801 W. Airport Freeway
Dallas, TX 75261

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Current Bid:
$35
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