Invaluable is an online auction aggregator that brings together live and timed auctions from thousands of independent auction houses around the world. Founded in 1989 as a printed price-result database under the name Invaluable Group and acquired and rebuilt as an online platform in the 2000s, it now hosts auctions from more than 5,000 partner houses across fine art, antiques, jewellery, watches, coins and other collecting categories. For the jewellery and gemstone trade it is one of the major secondary platforms alongside LiveAuctioneers and the dedicated channels of Sotheby's, Christie's, Bonhams, Phillips and Heritage.

Business model

The platform operates on a partnership model. Auction houses retain their identities, conduct their own sales, set their own terms and consign their own lots; Invaluable provides the technology layer that makes those auctions accessible to a global online bidding audience. Buyers register once with Invaluable and then bid into many different auctions through a single login. Invaluable charges a buyer's premium addition or commission on top of the auction house's own premium, with the rate varying by auction house and country.

Jewellery and gemstone presence

Jewellery and gemstones are among the most actively traded categories on the platform. Sales come from regional auction houses across North America, Europe and Asia, ranging from local estate sales handling vintage costume jewellery and minor stones up to specialist houses consigning signed period pieces and significant gem material. The platform's reach makes it a useful secondary market for both common and rare jewellery, although the consigning houses, rather than Invaluable itself, set authenticity and grading standards.

Price-history database

Behind the live bidding interface sits a substantial price-history database covering past auction results across the partner network. Subscribers can search prior sales by maker, period, gem type or other criteria, which makes the platform a research tool as well as a sales venue. For trade users assembling comparable sales evidence for valuation, insurance or estate work, the depth of the historical data is one of the platform's most useful features.

Risks and considerations

Bidding through an aggregator carries the same risks as any auction purchase: the buyer is responsible for due diligence, condition assessment and authentication. Invaluable's terms place these obligations on the consigning auction house rather than on the platform, so the quality of jewellery descriptions and gemstone treatment disclosure varies widely between houses. For jewellery containing meaningful stones, buyers commonly conditional their bids on receiving an independent laboratory report after sale, where the auction house permits this.