Laboratories of gemology offer various types of certificates who are declined in several sizes: full certificate, small certificate, credit card format, etc. Holograms, particular textures, micro-texts were incorporated into It appears under a plasticized printed paper on which are noted the characteristics of the diamond which was evaluated. Variables, based on the 4 c's ( cut, clarity, color, and carat), measurements, and physical properties, define each stone. The certificate is a diamond grading report, describing objective factors, both qualitative and quantitative, and an almost infinite combination of all of the IGI (International Gemological Institute)Ĭertificates appeared in 1970, they radically changed the ways and customs of the profession.GIA, IGI, HRD, AGS and EGL Diamond Certificate GIA, IGI, HRD, AGS and EGL Diamond Certificate, Diamond Certification Polished Diamond Guide Diamond Certification.
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