Bonas Group is the the world’s largest independent diamond and gemstone tender/auction house, representing 11 mines across 3 continents. The firm is also the oldest diamond brokerage and consultancy firm in the world. A fifth generation, family-owned firm, Bonas combines stability in a shifting industry with the expertise and agility to anticipate and embrace change. Tender & Auction Sales Regularly organising diamond and gemstone tenders on behalf of mining companies and private sellers De Beers Relationship Management Assisting clients in optimising direct rough diamond supplies and commercial opportunities with De Beers Group of Companies Value Chain Consulting Industry reporting and consulting across the diamond pipeline, such as lab-grown diamonds and compliance