HRD was established in 1973, which mainly coordinates the activities of Belgian diamond industry. Over the years, HRD has become a recognized official organization in Belgium and internationally, and plays the role of organizer, spokesperson and media in Antwerp diamond industry. At the same time, HRD is also one of the most authoritative diamond inspection, research and certification institutions in the world, and the highest official management institution of the diamond industry in Antwerp, Belgium, the largest diamond trading place in the world. HRD is at the forefront of the research on diamond processing and testing technology and equipment in the world, and it is a pioneer force to commercialize and apply diamond scientific and technological achievements to diamond production. At the same time, HRD laboratory is one of the most well-equipped and technologically advanced diamond laboratories in the world. The diamond appraisal certificate issued by HRD is the guarantee of quality and authority. In the "4C" certification of diamonds (i.e. color, weight, clarity and cut), HRD gives each diamond the highest quality certification and strictly guarantees the uniqueness of each diamond. In diamond cutting, HRD- Antwerp spared no effort to upgrade the cutting to "excellent", which is the highest level of diamond cutting.
GIA refers to the Gemological Institute in the United States, which is a practical diamond certificate in the world.
These two kinds of diamonds are more authoritative and reliable, so no matter which kind of diamonds you own, they are all certified, so this kind of diamonds is more secure.