I am looking at a diamond engagement ring that is supposed to be EGL certified but does not have a certificate. The seller is trying to get a replacement certificate. I am a novice so bear with me...should the diamond have the cert. # inscribed on it? Before I decide to buy, I want to take it in for an appraisal and just wonder if the appraiser can get me the cert. # off the diamond to see if it matches the cert.?