Bonas Group is the world’s leading independent diamond and gemstone tender and auction house. Bonas runs cut and polished gemstone sales for private vendors and rough gemstone tenders for both large and small independent miners.
Upcoming events
19 > 23 October 2026
Sri Lankan Cut & Polished Sapphire Tender
BCG-2601
Viewing location: Bangkok
Tender closing 4pm (Asia/Bangkok)