A gem certificate, also known as a grading report, is an easily understood document prepared by an expert gemologist that describes the key characteristics of a gem. A certificate from a gemological laboratory verifies the quality of a loose gem and allows non-experts to make educated buying decisions. At EcoMoissanite, we rely both on our in-house expert gemologist to certify our moissanite gems and on highly regarded, internationally acclaimed gemological laboratories to certify every loose lab-grown diamond we offer. These laboratories use universally recognised standards for grading gems.

Moissanite Certification

EML Moissanite Certification

Our goal is to give our customers maximum assurance that they will receive the precious moissanite they purchased. EcoMoissanite’s warranty bring confidence when buying or selling moissanite. We are a standard of excellence for industry professionals and moissanite consumers around the globe. Our laboratories maintain the highest grading standards and are furnished with cutting-edge gemstone testing equipment. A grading report from EcoMoissanite represents the all-important 5th C: Confidence.

EcoMoissanite’s gemologists follow the GIA® grading scales for the certification of moissanite. We support the GIA® standards as defined by the GIA® grading laboratories. Every moissanite sold on our website, whether loose or jeweled, is of VVS1 clarity and D color.

All our moissanite gemstones are laser inscribed with a serial number matching their electronic reports and/or warranty cards. EcoMoissanite provides report verification services, allowing our customers to match their certificates to our database.

Visit our warranty page.

Diamond Certification

GIA Diamond Certification

Founded in 1931, the Gemological Institute of America, or GIA, is an independent, non-profit organization considered by many to be the world's foremost authority in gemology. Introduced in 1953, their diamond and gemstone grading system is recognized worldwide. Manufacturers from around the world send diamonds and gems to GIA for examination and analysis.

When a diamond is accompanied by a GIA certificate, the consumer is assured that the stone has been analyzed by an unbiased gemologist who upholds the highest standards of integrity, science, and professionalism.

Visit the official GIA website.


IGI Diamond Certification

Established in 1975, the International Gemological Institute, or IGI, is the largest independent gemological laboratory in the world, with locations in all major diamond centers. IGI's mission is to provide jewelry professionals and consumers with extensive education programs and reliable diamond and fine jewelry certification.

An IGI certificate is comprised of a detailed analysis of a diamond's characteristics by several expert gemologists.

Visit the official GIA website.


HRD Diamond Certification

The Hoge Raad voor Diamant (HRD), translated as "Diamond High Council", was established in Antwerp in 1973 as the European counterpart to the GIA. Representing the global diamond trade to public governments and diamond organizations, HRD monitors and reports the import and export of over half of the world's loose diamonds.

HRD is at the forefront of advanced research and education in the diamond industry. Based on internationally accepted standards, an HRD diamond certificate is highly regarded among jewelers and consumers.

Visit the official HRD website.


NGIC Diamond Certification

The National Gemstone Identification Center (NGIC) has demonstrated a commitment to upholding the highest ethical standards in the diamond and jewelry industry. Today, driven by a goal to provide premium grading and appraisal services for both jewelry professionals and consumers, the center employs more than fifty gemologists. The NGIC established its state of the art laboratory in 2007 to provide modern grading services for the Asian precious stones market.

Its unbiased approach to gem grading has made NGIC the premier Asian gemological laboratory. Consequently, an NGIC certificate guarantees an accurate analysis and evaluation of a lab-grown diamond.

Visit the official NGIC website.

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