CERTIFIED DIAMONDS, A GUARANTEE OF QUALITY AND VALUE OVER TIME
Every Calderoni stone is supplied with certificates issued by the world's leading international gemological laboratories. These certify and guarantee the authenticity of the diamonds and the information relating to their features.
Proof of authenticity is also accompanied by information on the carat, colour, clarity, cut, proportion and quality, and results in a sort of "identity card" relating to each individual diamond. A diamond certificate makes it easy to evaluate and compare stones, and is a guarantee of quality.
CALDERONI'S INTERNATIONAL DIAMOND CERTIFICATES
Founded in 1931 in the USA, the Gemological Institute of America (GIA) is the world's leading diamond certification institute. The GIA network boasts laboratories in all major countries. Here, the stones are analysed, and the certificate number is laser-engraved on the girdle of every diamond. The institute's certificates offer the highest standards of reliability, consistency and integrity. With its "Report Check", you can also check a diamond's certificate number online (www.gia.edu), view its features in detail, and download a digital copy of the certificate.
Established in 1973 by the Antwerp World Diamond Center (AWDC), the Hoge Raad voor Diamant (HRD) is the best known gemological institute in Europe. The HRD gemological certificate is issued by the High Council of Diamonds in Antwerp, the city where the most important European diamond exchange is based. The Antwerp laboratories conduct continuous research essential for the production of technologically advanced equipment able to guarantee excellent standards in the sale and purchase of diamonds.