There are two (2) ways to become a Certified Diamond Exchange seller.

If you already have GCAL certified diamonds, you would simply provide the administrator of CDE ( admin@cdediamonds.com ) with the following information:

Company Name & Address
Contact Name, Email, & Phone Number

GCAL Certificate Number
Selling Price/Ct
Your Stock/Lot Number

If you do not already have GCAL certified diamonds, you would simply submit the diamonds you wish to list to GCAL for certification. You may also contact GCAL to set up a Certified Diamond Exchange Seller program:

Gem Certification & Assurance Lab, Inc. (GCAL)
580 Fifth Avenue, Suite LL-05
New York, NY 10036
P 212-869-8985
F 212-869-2315
admin@CDEdiamonds.com