When buying Jewelry with a diamond size of a half-carat and above, it is important to receive a gemological certificate, confirming the quality of the diamond. In the certificate all the details are gathered and determine the rarity of the diamond. Besides the added value of a reliable purchase, the certificate is a document used for jewelry insurance. There are several leading laboratories in the world that provide the gemological evaluation to the certificate. At "Miller", any diamond size of a half-carat and above comes along with a gemological certificate.