International Diamond Manufacturers Association (IDMA)
c/o SBD, Hoveniersstraat 22
2018 Antwerp
Phone: +32 (0)3 233 11 29
Email: secgen@idma.net
Website: www.idma.net
 
World Federation of Diamond Bourses (WFDB)
Pelikaanstraat 62
2018 Antwerp
Phone: +32 (0)3 234 91 21
Email: info@wfdb.com
Website: www.wfdb.com