Certified Diamond Auctions

Auction Finder Australia is holding several jewellery auctions on Sunday, July 5, 2026, including Opulent Galleria – Gold Filled Jewellery, Opulent Galleria – Silver Filled Jewellery, Assorted Jewellery (multiple lots), Jewelzmerchants Auction Event, Opulent Galleria – 925 Silver Jewellery, and Opulent Galleria Moissanite Jewellery. Additionally, upcoming auctions include Sydney Airport Lost Property: Jewellery & Watches on Tuesday, July 7, 2026, Wholesale Mixed Gemstones Collections on Friday, July 10, 2026, and Estate Auction – Asian Items, Gems & Fossils, Clocks And Collectables on Sunday, July 12, 2026.

US Auction Online specializes in jewelry, featuring a wide array of diamond rings, Rolexes, and certified gemstones. The auction house also offers rare coins, fine art, and designer handbags.

Leading Online Auction Site is holding auctions for Rare Currency, Coin, Art and Jewelry on July 11; Antique, Vintage & Decorative Rugs, Antique Rug & Fine Art, Billionares Collection, Treasures from the Vaults of a Dallas Designer Part 2, Great Deals Numismatics, Art & Jewelry, NABA Rare Beer Cans & Breweriana, A Legacy of Lustre: Masterworks & Rarities, Premier Fine Art, Designer Jewelry, GIA Loose Diamonds & Alien Artifacts, and Natural GIA Graded Diamond & Investment Layouts on July 12; Exceptional Fashion: Featuring the Pucci Collection of Fiona Spear, The Glorya Kaufman Collection: Building Los Angeles, Collector's Modern & Contemporary, and Wholesale Jewelry & Certified Diamonds on July 14; Pop Culture Summer Festival, Low Premium Gold, Silver & Rare Coin, and July Pop Modern Mix on July 15; Estate and Fine Jewellery, Abell Weekly Online, Affordable Modern & Contemporary Art, Large Carat IGI certified Diamonds & Wholesale Jewelry, Private Museum Quality Collections, and July Thursday Discovery Auction on July 16; and Fine Western & American Art on July 25.

Federal Auction Service is holding a Fine Jewellery & Watch Auction on Sunday, July 12, 2026, featuring items such as an 88 GIA Certified 5.16ct Oval Brilliant Cut Fancy Yellow Diamond Ring, a Men's 18k Yellow Gold/Stainless Steel Rolex 'Daytona' Automatic Chronograph, and a GRS Certified 10.68ct Cushion Cut Vivid Green Emerald and Diamond Ring.

Richard Winterton Auctioneers Ltd is holding an Antique & Home Sale on July 13, July 20, and July 27, 2026.

Kaye's Auctions is holding an online Sheriff & Secured Creditor auction of new woodworking, tooling, and sandpaper, including a 2024 Land Rover Range Rover SE, from July 8–20, 2026. Mortgage sales for properties at 525 Boyd Avenue, 286 Aikins Street, 646 Boyd Avenue, and 341 Magnus Avenue will be held on July 23, 2026, and an unreserved online auction sale under the Garage Keepers Act for approximately 120 vehicles, including a 2024 Ram 1500 Classic and a 2024 Ford Explorer, will run from August 5–10, 2026.

Butterscotch Auction Gallery specializes in fine art, jewelry, and Asian art, featuring items such as a Patek Philippe 18K gold 'Gondolo' pocket watch and a Northern Qi / Sui Dynasty limestone Buddha

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

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

ComicConnect is holding a Summer Mega Monthly Preview auction on August 11.

Fox Auction Company is holding a Household Moving Online Auction on July 7.

Casco Bay Auctions specializes in Early American Furniture, Folk Art, Stoneware, Fine Art, and Nautical Antiques, with a focus on items like Connecticut Queen Anne Cherry Bonnet Top Highboys and Benjamin Blyth portraits. The auction house also features international art and antiques, as well as 20th-century art and design, including mid-century modern furniture and designer fashion.

NJ State Auto Used Cars specializes in pre-owned vehicles, offering a wide selection of cars, trucks, SUVs & Crossovers, Hybrid & Electric vehicles, and Vans. Their inventory includes popular models from makers like Mercedes-Benz, Honda, and Nissan, ensuring a diverse range of options for buyers.

Auctions manufacturing, metalworking, woodworking, food processing, printing, and general industrial equipment.

Specializes in estate auctions featuring personal property and real estate.

Showplace Fine Art & Estate Buyers specializes in purchasing estates, including designer furniture by makers like Poul Kjærholm / Fritz Hansen and Piero Lissoni / Living Divani, as well as fine art and antiques. They offer competitive outright purchases for individual items or entire collections, aiming to provide a streamlined and hassle-free selling experience.

Specializes in estate sales featuring Packard, Ford, and Chevy vehicles, alongside tools, equipment, and vintage items. Other sales include Mid-Century, Disney, and Hidden Gems, as well as Certified Lab Grown Diamond Fine Jewelry. The platform also offers Memorabilia & Collectibles Auctions and Estate and Fine Jewellery Sales.

Gardner Galleries Auctioneers is holding an Indigenous Art Auction, July Art Session I, an auction of Furnishings, Figurines, Fine China, Silver, Toys & More, a Books Featuring Fine Bindings auction, an Estate Jewellery & Watches auction, a Unique Collectibles, Vintage Jewellery & More auction, a John McIntyre Estate Decorative Arts Featuring Talking Earth Pottery - Session II auction, an Antique & Retro Furnishings, Decorative Arts, Collectibles & Couture auction, and a July Art Session II auction, all with bidding active. Upcoming auctions include The Collections of Dr. Richard Gardiner, Collectibles, Figurines, Curios & Decorative Arts, Estate & Consignment Jewellery & Coins, August Art, Robert Carter Estate Session X - Barn Bric-a-Brac, Rare, Antique & Vintage Books, Collectibles & More, Decorative Arts Featuring Asian Collectibles & Artifacts, Important Estate Jewellery, and a Collector Auction.

Stephan Welz & Co | Johannesburg is holding a July Promenade Auction, timed online, ending on July 19, and a Fabulous Luxury Jewellery Auction, timed online, ending on August 6.

Upcoming auctions include an Estate and Fine Jewellery Sale on July 16, and Murano Glass & Ceramics on July 22.