× Sign up for our newsletter Email* × Mail to friend Send to your friend this product Your Email* Friend Email Message* Email This field is for validation purposes and should be left unchanged. × Book A Tour Contact a diamond consultant Contact a diamond consultant Our award winning diamond consultants help you select the best diamond jewellery for any budget. Mr. / Mrs.* Mr. Mrs. First Name* Last Name* Phone number Email address* Message Email This field is for validation purposes and should be left unchanged. Search Diamondland logo Book a Tour Email Customer Service Diamond Education The 4 C’s of Diamond Valuation. Part 1: Carat March 1, 2016/ BY Coster Diamonds The Carat of a diamond Mr. Donny Griffioen is the Chief Purchasing also Director at Coster Diamonds. Therefore responsible for the diamonds we trade in. He has been working in the diamond industry from a very young age. He is also co-created the Royal 201 and he is one of the most hihgly respected authorities on diamonds. In this 4 part series he will explain and show you the parts of diamond valuation, commonly known as the 4 C’s. In the first part of this series he will explain everything there is to know about carat and he brought some beautiful examples to show. TAGS carat of a diamond diamond education diamond valuation The 4 C's Share on 2 Comments Choosing the Right Color Diamond Previous Article The 4 C’s of Diamond Valuation. Part 2: Cut Next Article Coster Diamonds Writter Coster Diamonds is the oldest diamond polishing factory in the world. Located in the heart of Amsterdam between the Rijksmuseum and the van Gogh museum we welcome more than 400.000 visitors each year. The largest selection of unset diamonds, the finest diamond jewellery and tax-free shopping makes us a must-see hotspot for anybody visiting Amsterdam or looking for high quality diamond jewellery. 2 Comments Reply Follow Me Instagram This 2,5 crt cushion cut was just polished from our Master polisher. An exceptional stone and a beautiful cut. #royalcosterdiamonds #royaldiamonds #diamonds #diamond #cushioncut #diamondpolish Summer Sale Surprise #royalcosterdiamonds #royalcoster #royal #diamonds #diamond #summersale #summer #sale #jewelry #surprise #design #amsterdam #cityofdiamonds Surprise Summer Sale! #royalcosterdiamonds #royalcoster #royalcosterdiamonds #diamond #diamonds #shiny #highjewelry #jewelry #design #style #summer #sale #surprise #rings #diamondring #amsterdam #diamondcity #museumsquartier Counting diamonds #royalcosterdiamonds #highjewelry #diamonds #diamond #loosediamonds #counting #precious #unique #sparkling #playoflight #light #reflection Champagne and diamonds: the absolute. Win a real diamond while having a champagne tour at Royal Coster. More info in our bio. #highjewelry #royalcosterdiamonds #royalcoster CUSTOMER SERVICE Email Customer Service Product Care Privacy Policy Terms & Conditions CONNECT TO US Sign up for our newsletter Facebook Twitter Instagram Pinterest CORPORATE INFORMATION About Royal Coster Diamonds Press & News Country Managers CONTACT Royal Coster Diamonds B.V. Paulus Potterstraat 2-6 1071 CZ Amsterdam The Netherlands. +31 (0)20-305 5555 +31 (0)20-305 5556 Open daily, including Sundays from 09:00 AM to 17:00 PM © 2018 Coster Diamonds. All Rights Reserved Royal Coster Diamonds Diamond Rings Diamond Jewelry Book a free guided tour Tours & workshops Coster Diamonds VIP Service About Royal Coster Blog