De Ruiter Diamonds is Europe's leading authority in diamond assessment. This means that our employees are committed to delivering the perfect assessment reports every day. With this service we offer a transparent inspection of your diamonds in collaboration with GIA, HRD and IGI. Thanks to our many years of experience, we know exactly which certificate best suits your diamond. Our GIA certified gemologist will first perform a review on your diamond to provide you with expert advice. Do you want to have your jewel or piece of jewelery graded or certified? We provide your valuables with a jewel certificate. Handy! This also gives you proof of authenticity for your insurance and the preparation of an appraisal report. Do you wish to sell or auction your diamonds after certification? we also provide you with expert advice.