Are you interested in learning everything there is to know about the craft of diamond polishing? Then the Diamond Masterclass at Royal Coster Diamonds is the perfect experience for you. It is given exclusively by the head of our diamond polishing department who will give you in-depth masterclass that ends – if you do it correctly - with an official Royal Coster Diamonds certificate.
Full refund is guaranteed if the cancellation is made 48 hours prior the offer's start date. We don't apply any refund if the cancellation is made less than 48 hours before offer start date.