CK Gems

Diamond Grading Laboratories

To insure the quality of your purchase as well as the integrety of the diamonds we sell, we only offer diamonds with GIA (Gemological Institute of America) and AGS (American Gem Society) certifications.

What do these laboratories do?

Diamond grading labs provide an unbiased and objective evaluation of the characteristics of a diamond in a report form that provides consumers with a benchmark by which to help determine the quality of a diamond.

What do the certificates look like?

Click the links below to view sample certificates fom both GIA and AGS laboratories.

  • GIA Diamond Grading Report
  • GIA Diamond Dossier Report (Includes laser inscription)
  • AGS Diamond Quality Document

Begin your search for the right diamond or send us a request or if you're ready, take the GIA Diamond Buyer Primer Course.