Highlights DMCC will host six diamond tenders in its Dubai Diamond Exchange, the worldâs largest diamond tender facility, in January 2021. DMCC â the worldâs flagship Free Zone and Government of Dubai Authority on commodities trade and enterprise â will host six diamond tenders in its Dubai Diamond Exchange, the worldâs largest diamond tender facility, in January 2021. This follows a record-breaking tender hosted in December 2020, which saw the largest ever rough diamond tender sales in the UAE, in a sign that the industry is regaining momentum. Throughout the month, three new companies will be hosting tenders on the new DDEâs floor for the first time - IHenning, KOIN International and Choron / Bonas Group - in addition to regular long-term hosts Trans Atlantic Gems Sales (TAGS), Stargems and Rapaport.