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Diamond Auctions Spark Surge in High‑Carat Gems and Lab‑Grown Cuts
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The most immediate diamond auction on the calendar concludes on September 8, when KC Auction & Appraisal Company wraps its mixed‑item sale. While the event showcases a broad range of collectibles, the spotlight falls on classic diamond rings that dominate the estate segment, underscoring a steady appetite for high‑carat, colorless stones among seasoned bidders.

Just two days later, on September 10, Kodner Galleries will close a high‑profile evening auction featuring a 21.99‑carat diamond ring from a renowned house. The sheer size of the stone, coupled with its documented provenance, highlights a growing trend: collectors are gravitating toward singular, statement diamonds that serve both as investment and status symbols.

Beyond these dated events, several platforms are gearing up to market diamonds without fixed timelines. Lot‑tissimo’s upcoming luxury auction promises fine diamonds alongside decorative pieces, while Dupuis Fine Jewellery is preparing a fall series that will list signed diamonds and period pieces, reflecting a niche demand for historic and branded stones. Worthy, an online marketplace, emphasizes a rapid turnover model where sellers list diamond studs, pendants and cross‑shaped pieces, receiving offers from a pool of over a thousand professional buyers within two weeks.

First State Auctions has launched an online offering that includes 5.81‑carat European‑cut diamond studs and a 3.22‑carat emerald‑diamond hybrid, signaling a blend of colored and white diamonds in the secondary market. US Auction Online is featuring a 4.63‑carat lab‑grown diamond, illustrating the expanding acceptance of synthetic gems as a cost‑effective alternative to natural stones.

Collectively, these auctions reveal three clear currents: a premium placed on ultra‑high‑carat natural diamonds, a rising interest in colored or hybrid diamonds, and a swift integration of lab‑grown diamonds into mainstream bidding. Sellers are capitalising on digital platforms to reach global audiences, while buyers are leveraging online tools to verify provenance and assess market value in real time.

Based on 101 digest summaries · Generated September 9, 2025

Black Diamond Auctions Ltd.

September 4, 2025 —

Black Diamond Auctions Ltd. is gearing up for an exciting lineup of auctions, featuring a diverse range of items that cater to various interests. Their online auctions are currently active, providing an opportunity for bidders to find unique personal property, including antiques, tools, and furniture. In addition to personal property, Black Diamond Auctions specializes in real estate auctions, offering homes, lake homes, farms, and commercial buildings. This auction house has built a reputation for facilitating smooth transitions for sellers looking to downsize or liquidate assets. For those interested in participating, details about upcoming auctions can be found on their website. Whether you're looking to buy or sell, Black Diamond Auctions promises a fun and engaging experience. Visit their site for the latest auction schedules and to explore the variety of items available.

First State Auction

September 4, 2025 —

First State Auctions is currently hosting an exciting online auction featuring an exceptional private collection from an international socialite. This auction includes a diverse selection of 409 lots, showcasing stunning items such as 5.81ct Old European Cut Diamond Studs, a 3.22ct Colombian Emerald and Diamond ring, a Rolex Master II Batman Watch, an Hermes Birkin 30, and an 8.40ct Diamond Dress Necklace, with estimates ranging from $4,000 to $23,000. With a buyer's premium of 20%, this auction presents a fantastic opportunity for collectors and enthusiasts alike. For those interested in future auctions, First State Auctions specializes in jewellery, watches, diamonds, and designer bags, inviting you to check their website for upcoming events. Don't miss your chance to acquire unique pieces at competitive prices!

US Auction Online

September 4, 2025 —

US Auction Online is hosting an exciting array of auctions featuring a diverse selection of items. Upcoming highlights include a stunning 4.63 CT lab-grown diamond with D color and VVS2 clarity, a rare 1934 $1000 Federal Reserve note, and an exclusive Salvador Dali signed lithograph from the 'New Jerusalem' suite. Jewelry enthusiasts can look forward to a 10.25 CT diamond cross pendant in 14K white gold and a 6.40 CT hand-carved Colombian emerald pendant adorned with natural diamonds. Collectors will also find a Rolex Datejust II watch and a highly collectible screenprint by Mr. Brainwash featuring John Lennon. For those interested in unique home decor, there are exquisite rugs and fine art pieces, including works by Camille Pissarro and Alexander Calder. Visit US Auction Online to explore these items and more, and to stay updated on future auction dates.

Kimberley Auctions

September 10, 2025 —

Kimberley Auctions is excited to announce its upcoming auction featuring a stunning selection of fine jewellery and luxury watches. Highlights include a Patek Philippe Chronograph 5170G-010, known for its elegant black dial and white gold case, along with an exquisite Emerald Sapphire Diamond Set Gold Bracelet and a captivating Emerald Diamond Ring. The auction will showcase over 16 unique pieces, including both new and pre-owned items, all available at reserved wholesale prices. This is a fantastic opportunity for collectors and enthusiasts to acquire high-quality jewellery and timepieces, each backed by international GIA certificates. Mark your calendars for this not-to-be-missed event, and visit Kimberley Auctions' website for more details and to register your interest in attending. Whether you're looking for a statement piece or a timeless classic, Kimberley Auctions has something for everyone.

John Pye Luxury Assets

September 4, 2025 —

John Pye Luxury Assets is set to host an exciting Luxury Watch Auction featuring some of the most sought-after timepieces. Among the highlights are the Patek Philippe Nautilus 5980/1R, renowned for its nautical design and mechanical excellence, and the Patek Philippe Nautilus 5711/1R, a stunning rose gold model with a bespoke diamond-set case. Additionally, the auction will showcase the Rolex Sky-Dweller 326933, known for its dual time functions and intricate movement, also featuring a unique diamond-set design. These auctions are part of John Pye's commitment to offering high-end watches, jewelry, fashion, antiques, and collectibles. For more information or to schedule a viewing, interested bidders can reach out via email or phone. Be sure to check their website for upcoming auction dates and details.

Diamond Comic Distributors

September 4, 2025 —

Diamond Comic Distributors, the leading distributor of English-language comics, toys, and games, continues to support the Direct Market with exciting auction opportunities. While specific upcoming auction dates are not detailed, collectors and enthusiasts are encouraged to explore a diverse range of pop culture products, including comics and collectibles. For the latest auction dates and featured items, please visit their website and stay tuned for updates.

Sell Diamonds, Jewelry and Watches for the Best Price

September 4, 2025 —

Worthy is gearing up for exciting upcoming auctions, providing an excellent opportunity for those looking to sell diamonds, jewelry, and luxury watches. Their platform connects sellers with over 1,000 professional buyers who compete to offer the best prices for items such as diamond rings, bracelets, necklaces, earrings, and branded watches. Worthy's unique model ensures that sellers only pay fees when they successfully sell their items, aligning their interests with those of their clients. The auction process typically takes 10-14 business days from the arrival of your jewelry at Worthy's headquarters to payment issuance. Sellers can feel secure throughout the process, as items are fully insured during shipping. For more information on how to get started and to check for the next auction dates, visit Worthy's website. Don't miss the chance to turn your valuables into cash with their trusted service!

Great Lakes Coin & Jewelry

September 4, 2025 —

Great Lakes Coin & Jewelry is gearing up for exciting upcoming auctions featuring a diverse selection of items. On September 15, 2025, collectors can look forward to bidding on rare coins, including American Gold Eagles and various silver bullion pieces. Additionally, a special auction on September 22, 2025, will showcase exquisite estate jewelry, including diamond rings and unique silver pieces. For those interested in expanding their collections, Great Lakes Coin offers a wide range of bullion products, rare coins, and estate jewelry. Whether you are a seasoned collector or just starting, there's something for everyone. Be sure to check their website for more details on these auctions and future events.

Dawson's Auctioneers

September 4, 2025 —

Dawson's Auctioneers is set to host several exciting auctions in September 2025. The first, "Dawsons Discovery: Fine Antiques & Collectables," will take place on September 17, featuring a rare ceramic by Laurence Perugini for Doulton, estimated at £2,000 - £2,500, and a large Japanese patinated bronze Jizai, estimated at £3,000 - £5,000. Following this, on September 18, the "Fine Jewellery, Watches & Silver" auction will showcase a Cartier 18ct Gold Tank Divan Wrist Watch, estimated at £2,500 - £3,500, and an emerald and diamond pendant, estimated at £8,000 - £12,000. Finally, on September 24, the "Fine Pictures, Prints & Sculptures" auction will feature notable works, including Euan Uglow's "Still Life," estimated at £15,000 - £20,000, and Damien Hirst's "The Souls II," estimated at £6,000 - £8,000. For more details and to view the full catalog, visit Dawson's Auctioneers' website.

Wears Auctioneering

September 4, 2025 —

Wears Auctioneering has several exciting online auctions coming up. On September 7, 2025, two auctions will end at 8:30 PM: "Mini Excavators & Attachments" in Solon, IA, and "Diamond Creek Dandies! ATV to Artwork, Tools to Toys" in Salmon, ID. Pickup for both will be available shortly after the auctions conclude. Following that, on September 8, 2025, the "Tractors, Trucks, & Trains, OH MY! Toy Auction" will also end at 8:30 PM in Solon, IA, with pickup scheduled for September 10. Additionally, the "Barbara Peets Prints - Monarch Cook Stove & Other Treasures" auction will end at the same time in Salmon, ID. On September 9, 2025, the "Magnificent Housewares IN CHEYENNE" auction will conclude at 7:00 PM, with pickup on September 11. Lastly, on September 17, 2025, the "Country Living & Collectibles" auction will end at 8:30 PM in Center Point, IA. For more details and to explore future auctions, visit Wears Auctioneering's website.

Bay Area Estate Liquidators

September 10, 2025 —

Bay Area Estate Liquidators is gearing up for exciting upcoming auctions featuring a diverse array of items. Their expertise includes the liquidation of antiques such as furniture, fine art, and rugs, ensuring sellers receive top dollar for their valued possessions. Additionally, they specialize in auctioning diamonds and diamond jewelry, as well as vehicles like cars, boats, and RVs, maximizing value for sellers. For those with precious stones or coins, Bay Area Estate Liquidators guarantees a fair cash value and access to reputable buyers. Their full-service approach ensures a seamless transition from estate property to cash, with a focus on achieving the highest payouts for all items. To learn more about their upcoming auction dates and featured items, visit their website or contact them directly.

Leading Online Auction Site

September 10, 2025 —

This week at Leading Online Auction Site, several exciting auctions are set to take place. On September 9, 2025, Brunk Auctions will host a British & Continental live auction, featuring a range of fine art and antiques. Following that, DuMouchelles will present its September 2025: Day One live auction on September 11, showcasing estate jewelry and sterling silver from distinguished Michigan collections, including a notable diamond ring. Also on September 11, Block Auction House will hold an Autographed Sports Memorabilia Auction, featuring items from baseball, football, basketball, and more. For collectors of fine art, the Modern & Contemporary Auction at Robinhood Auctions will also take place on the same day, highlighting works from renowned artists like Salvador Dali and Pablo Picasso. Don't miss the opportunity to explore these auctions and more by visiting Leading Online Auction Site for the latest updates and catalogs.

Franklin Browns Limited

September 4, 2025 —

This event will feature a diverse array of items, including a large oil painting titled "Red Still Life" by Glen Scouller, a stunning Chinese porcelain Doucai bowl, and a late 19th-century diamond flower head brooch. Collectors can also look forward to unique pieces such as an early 18th-century Delft dry jug and a mid-century Aubusson tapestry by Robert Wogensky. For those interested in quality antiques and fine art, Franklin Browns offers a professional and enjoyable auction experience. To stay updated on future auctions and view their latest offerings, visit their website for more details.

Kodner Galleries

September 4, 2025 —

Kodner Galleries is set to host an exciting auction on September 10, 2025, at 6 PM. This event will feature a diverse selection of estate jewelry, art, and collectibles. Highlights include a stunning Loetz Art Glass Vase, a Roman Glass Amphoriskos, and a remarkable 21.99-carat diamond ring by Graff, certified by GIA. Additionally, luxury items such as a Hermes Haut a Courroies Hac 55 Bag and a Gucci Monogram Duffle Bag will be available for bidding. For those interested in participating, options include bidding in person, by phone, or through various online platforms such as Bidsquare and Invaluable. Don't miss the chance to acquire unique pieces from this upcoming auction. For more details and to stay updated on future events, visit the Kodner Galleries website.

J. Garrett Auctioneers

September 4, 2025 —

J. Garrett Auctioneers is set to host an exciting auction on September 20, 2025, featuring property from the W. Ray Wallace Trust and The Dianne Cash Estate. This event will showcase a variety of items, including period antiques, fine art, designer jewelry, and luxury goods. Notable highlights include a stunning GIA 5.03 carat emerald cut diamond and a highly coveted Tiffany Audubon flatware service. As Dallas' favorite boutique auction house, J. Garrett Auctioneers prides itself on personalized service and a long-standing reputation for integrity in the auction industry. For those interested in consigning items or learning more about upcoming auctions, visit their website for details. Don't miss this opportunity to discover unique treasures!

Michael Spooner Auctions

September 4, 2025 —

Michael Spooner Auctions is set to host an Estate Auction on September 22, 2025, at the St. Elias Centre, located at 750 Ridgewood Ave., Ottawa, ON. A preview of the auction will take place on the same day from 2:00 P.M. to 5:00 P.M. Featured items include an O.D. Jennings Standard Chief 25 cent slot machine, a sterling ruby and sapphire bangle bracelet, a Chinese silk dragon horse carpet, and a 14K white gold diamond swirl ring. Additionally, collectors can look forward to a Birks sterling rose bower flatware service for 12 and a large Reed & Barton sterling tea service tray. For those interested in consigning items for future auctions, Michael Spooner Auctions is currently accepting consignments. Visit their website for more details and to explore the auction catalogue.

Mellors & Kirk Auctioneers, Nottingham

September 10, 2025 —

Mellors & Kirk Auctioneers in Nottingham has several exciting auctions coming up. On September 10, 2025, a notable auction will feature a Meissen figure titled "Count Bruhl's Tailor." Following that, a Jewellery, Silver & Fine Art Auction is scheduled for October 7, 2025, at 10 AM, showcasing exquisite Arts and Crafts pearl and enamel brooches. Additionally, a Jewellery, Antiques and Collectors Sale will take place on November 4, 2025, at 10 AM, highlighting an emerald and diamond double heart ring from 1897, along with a rare Commonwealth oak casket or writing box dated 1650. For those interested in unique collectibles and fine art, Mellors & Kirk offers a diverse range of items. Readers are encouraged to visit their website for more details on upcoming auctions and to explore the fascinating pieces available.

Michaan's Auctions

September 10, 2025 —

Michaan's Auctions is set to host an exciting September Gallery Auction on September 19, 2025, starting at 10 a.m. Featured items include a carved and polychrome painted Mickey Mouse carousel figure, a 19th-century Continental School painting of a peacock on a branch, a stunning Chinese turquoise, diamond, and 18k yellow gold spray brooch, an antique Louis Vuitton travel streamer trunk, and a Chinese bronze carved Yi vessel with base. For those interested in bidding, Michaan's Auctions offers various options, including in-person attendance, absentee bidding, and telephone bidding. For more information on upcoming auctions and to explore their diverse offerings, visit their website or contact them directly.

John Nicholson's

September 4, 2025 —

John Nicholson's Fine Art Auctioneers will host several exciting auctions in the coming weeks. On September 10, 2025, the Fine Antique Auction will feature a range of remarkable items, including a pair of 19th-century terrestrial and celestial globes by Thomas Malby & Son, estimated at £30,000-40,000, along with a Tavannes Cyma platinum and diamond pocket watch, estimated at £800-1,000, and a cast gilt bronze Sevres design repeater carriage clock, estimated at £600-800. Following this, the Fine Painting Auction is scheduled for September 17, 2025, at 11:00 AM, showcasing exquisite artworks for collectors and enthusiasts alike. Finally, the Antiquarian Book Auction will take place on September 23, 2025, at noon, offering a selection of rare and valuable books. For more details on these auctions and to explore future events, visit John Nicholson's website.

Gaston & Sheehan Auctioneers

September 4, 2025 —

Gaston & Sheehan Auctioneers has several exciting auctions coming up. The U.S. Marshals Service Coins & Bullion Auction features gold, platinum, and silver coins and bullion, running until September 9, 2025. Also concluding on the same day is the U.S. Marshals Service Jewelry Auction, showcasing gold and diamond jewelry from renowned brands like Tiffany & Co., Hermes, and Rolex. For vehicle enthusiasts, the Southside Wrecker & Austin Police Department Online Auction offers a variety of vehicles, including a 2014 Freightliner Cascadia and a 2013 Dodge Charger, ending on September 10, 2025. Additionally, multiple online vehicle auctions from various towing services will also close on September 10, featuring models such as a 2022 Ford Mustang and a 2019 Chevrolet Silverado 1500. Lastly, the U.S. Marshals Service Art Auction, featuring works by Andy Warhol and other notable artists, will run until October 2, 2025. For more details and to participate, visit TXAuction.com.

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