The Investment Grade filter on RapNet is based on the GIA data and uploading a Rapaport Diamond Certificate (RDC)

In order to receive an RDC, you will need to send the stone to RapLab for quality control and for physical inspection of the diamond and verify the following criteria:

  1. No borderline or grading errors by the GIA
  2. No Black Center (not graded by the GIA)
  3. No Shade/Tint (not graded by the GIA)
  4. Not Milky (not graded by the GIA)
  5. Meets RapSpec Specifications

Please go to for further information on RapLab and RDC

Did this answer your question?