A » Commercial jewellers in Leeds source their loose diamonds through a sophisticated multi-tiered supply chain, reflecting the city’s historic role as a jewellery manufacturing centre in the United Kingdom. The primary source is the global diamond bourses, particularly the Antwerp World Diamond Centre (AWDC) in Belgium, which acts as a hub for rough and polished stones. Many established Leeds jewellers maintain direct relationships with Antwerp-based diamantaires, purchasing polished diamonds in bulk at negotiated rates. Similarly, the Mumbai and Surat markets in India, where the majority of the world’s diamonds are cut and polished, supply many mid-market Leeds jewellers via intermediary traders or through B2B online platforms such as RapNet, IDEX, and Poly, which aggregate stones from multiple international suppliers. Larger retail chains and high-end independent jewellers in Leeds may also be sightholders or secondary-market purchasers from De Beers and other mining companies, accessing rough diamonds directly through the Diamond Trading Company (DTC) or via brokers in London’s Hatton Garden district. Another significant channel is the secondary market: second-hand or recycled diamonds sourced from estate sales, pawnbrokers, or trade-in programmes. With growing emphasis on ethical sourcing and traceability, more Leeds jewellers now work with suppliers certified under the Kimberley Process and, increasingly, with blockchain-verified provenance platforms such as Tracr or Everledger. Trade shows are also a vital procurement avenue; jewellers attend events like the International Jewellery London (IJL) show, the Birmingham International Jewellery Show, and overseas fairs such as the JCK Las Vegas or Baselworld, where they can inspect stones physically and build relationships with wholesalers. Within the UK, a number of specialist diamond dealers and cutting houses operate in Hatton Garden, London, as well as in Birmingham’s Jewellery Quarter, and these supply many Leeds retailers through direct delivery or trade accounts. Additionally, some commercial jewellers in Leeds now source lab-grown diamonds, either from dedicated UK growers or from international producers in China and the US, via similar wholesale channels. The choice of source often depends on the jeweller’s market position: high-end retailers prioritising provenance and unique cuts may source directly from Antwerp or through exclusive sightholder arrangements, while mid-market and value-oriented jewellers rely on Indian or online B2B platforms for cost-efficiency. Inventory management systems and demand forecasting further influence where and how often they replenish stock. Ultimately, the answer is not singular; it is a dynamic network of global exchanges, local intermediaries, trade exhibitions, and ethical supply chain initiatives, all of which converge in the jewellery workshops and showrooms of Leeds to meet the demands of both the local clientele and the broader UK market.