Certified Diamond Auctions

US Auction Online is holding auctions featuring a wide array of items including jewelry, art, coins, designer goods, and collectibles. Specific lots include a GIA Certified 4.02CTW Earth Mined Diamond Ring, a Rolex stainless steel Date Just watch with diamonds, and a Classic Wallace Rose Point Sterling Flatware Service for 12.

Federal Auction Service specializes in liquidating fine jewelry and Swiss watches, with recent results including a GIA certified 5.46ct Colombian Emerald and Diamond Pendant Necklace that sold for $45,000. The house also features a remarkable selection of Rolex watches, from iconic sports models to elegant dress pieces.

Kodner Galleries is holding an auction on Wednesday, August 5th, featuring estate jewelry, art and collectibles including a Camusso Silver Platter, Camusso Silver Chargers, Camusso Silver Roosters, works by David Gerstein and Victor Vasarely, an Emerald, Diamond and 18K Ring, a Sapphire, Diamond & Plat. Bracelet, a Patek Philippe 5980/1R, and an Emerald, Diamond & 18K Owl Brooch.

Richard Winterton Auctioneers Ltd is holding Antique & Home Sales on August 3rd, August 10th, and August 17th, 2026, each starting at 9:00 am with Garden Effects, Tools, and Electricals, followed by Jewellery, Watches, Coins, Silver, Pictures, Ceramics, Glass, and Household Miscellaneous at 10:30 am.

Upcoming auctions include a 31-lot collection of gold-filled jewellery from Grays Online closing July 26, alongside an 11-lot ex-retail gold and natural diamond jewellery auction from Grays Online also closing July 26. Additionally, Grays Online is offering a 6-lot ex-retail gold and natural diamond jewellery auction, a 2-lot natural giant pink diamond auction, a 4-lot natural pink diamond auction, a 30-lot 925 silver jewellery auction, a 41-lot jewellery and collectables event, a 3-lot Castellani designer jewellery auction, an 11-lot luxurious pearl and gemstone jewellery auction, and a 27-lot silver-filled jewellery clearance, all closing July 26.

Upcoming auctions include a Live Fine Jewelry & Luxury Watches Auction, Crystal Treasures & Porcelain Gems, and a July Fine Art & Antiques Auction on July 31. On August 1, there will be a 2026 Summer Fine Art & Antiques Day 1, a Rare Currency, Coin, Art and Jewelry Event, an Americana, Fine Arts, and Decorative Arts Auction, a Portland Professional Coin Auction, a Coins, Currency, Gold, GIA Designer Jewelry & More auction, a Subasta de los Sábados 1345, a Summer Luxury Estates sale, a 5 Star Auctions Summer Collection, and a 2026 July AUCTION ONE Collection. August 2 features a Great Deals Numismatics, Art & Jewelry Event, The Marine Auction, 2026 Summer Fine Art & Antiques Day 2, a Multi Estate Dollhouse Miniature Summer Auction, a Portland Professional Coin Auction, a Haight-Ashbury, San Fransisco Estate auction, an Urban, Pop & Contemporary Art sale, and an End of Summer Jewels, Watches & Estate Finds auction.

Auctions cars, trucks, vans, agricultural equipment, aircraft, ATVs, boats, construction equipment, motorcycles, RVs, snowmobiles, and various trailers.

Fox Auction Company is holding a Living Estate Online Auction on July 27, and the Bill Robinson Retirement Machinery Auction-Live w/simulcast online bidding on August 28.

Apex Auctions is holding sales on August 5, 2026, featuring Baker Hughes Industrial & Energy Technology inventory in Saudi Arabia and a Trumpf TrumaBend V85S and PA Industries De-Coiler in the United Kingdom. Upcoming auctions include precision surface finishing and shot blasting equipment from Rolls-Royce on August 6, a 2021 Zeiss MMZ G 60/70/12 Bridge Type CMM on August 11, and BAE Systems Submarines equipment on August 11. Additional sales are scheduled for August 12, featuring late model equipment from a UK exhaust aftertreatment systems business and a retirement sale of metal fabricators, followed by surplus late model pharmaceutical R&D and analytical laboratory equipment on August 18, and a Baker Hughes dust collector on August 20. Further auctions include an Engel E-Motion injection moulding machine on August 20, a closure of a subsea & energy engineering test facility on August 21, Baker Hughes RIG mud pumps on August 26, and GE Aerospace Taiwan equipment on August 27.

Jones & Co Auctions is holding its Fall Art & Luxury I auction from October 4-18, 2026, featuring Canadian artwork, designer bags and accessories, luxury watches, and fine jewellery.

Coach's Corner Sports Auctions is holding an auction on August 21, 2026, featuring a RUSH band-signed electric guitar, a Van Halen band-signed electric guitar, a Caitlin Clark hand-signed Indiana Fever jersey, a KISS band-signed electric guitar, and a 2021 Topps #150 Shohei Ohtani BB card.

Heath Industrial Sales specializes in the auction of manufacturing, metalworking, woodworking, food processing, printing, and general industrial equipment. They have over 40 years of experience converting industrial assets into capital for businesses, banks, estates, and bankruptcy trustees.

South Dublin Auction is holding a timed auction ending August 2, 2026, featuring high-end whiskey, silver, art, furniture, jewellery, and collectibles, including a 18 carat yellow gold spray diamond ring and a Montblanc Meisterstück fountain pen.

Butterscotch Auction Gallery is holding its September Sale on September 13, 2026, featuring items such as THEORA ALTON HAMBLETT's "Faithfully Waiting," a PATEK PHILIPPE 18K GOLD 'GONDOLO' POCKET WATCH, a 1718 MAP of the MISSISSIPPI RIVER VALLEY, and a PAIR OF VERDURA BLACK JADE, PEARL & DIAMOND EAR CLIPS.

Fortuna Auction is holding a timed auction for Fine Jewels, Watches & Handbags that closes on August 2, 2026, featuring a Tiffany & Co. diamond line bracelet and other luxury accessories. Additional auctions are scheduled to open on August 6, 2026, and August 16, 2026, with details to be announced.

Gardner Galleries Auctioneers is holding the W.R. Antiques Auction (Formerly the Old Town Hall) starting Monday, August 3rd, featuring jewellery, antique furniture, art, military items, ceramics, and more.

PropertyRoom.com features online police auctions of jewelry, watches, coins, electronics, fashion, fine art, and vehicles. Auctions often start at $1, offering deals on items from brands like Apple and Prada.

Auctions cars, trucks, vans, agricultural equipment, aircraft, ATVs, boats, construction equipment, motorcycles, RVs, campers, and various trailers.

Stephan Welz & Co | Johannesburg is holding a timed-online auction for Fabulous Jewellery, Watches & Wine ending on August 5, 2026, and a Rare & Collectable Book Auction online only, ending on August 23, 2026.

Western Livestock Auction, LLC is holding a FEEDER & REGULAR SALE on August 5, 2026, which will include Heryford - 46 Black Angus Yearling Heifers from Triangle Cattle / R&R Bronec Grain & Cattle. Upcoming sales include a REGULAR SALE on August 12, a FEEDER & REGULAR SALE on August 19, and a SHEEP / GOATS AND REGULAR SALE on August 26.

Cascobay Auctions is holding its ANNUAL SUMMER AMERICANA AUCTION on Saturday, August 15, featuring Early American Furniture, Folk Art, Stoneware, Fine Art, and Nautical Antiques.