Royal Coster Diamonds has the largest collection of loose diamonds in Europe, outside Antwerp. Within this exceptionally extensive inventory, you will find a wide selection of diamonds in various cuts, carat weights, and qualities. This allows us to translate almost every wish into a diamond that suits your preferences and budget. On this collection page, you only see a fraction of what we actually have in stock.

Each loose diamond is carefully selected and cut according to high quality standards. Within our collection, you will find both classic and more distinctive diamonds, ranging from subtle stones to impressive eye catchers. All diamonds are certified by the largest institutes, including GIA and IGI, so you always have insight into the characteristics and quality of your diamond.

A loose diamond offers complete freedom of choice. You first select the diamond and then decide in which setting it will be placed, whether this is a ring, pendant, or another piece of jewelry. Our specialists guide you personally in comparing diamonds based on the 4Cs and provide transparent advice on differences in appearance and price.

Thanks to our exceptionally large inventory, we can move quickly and present multiple options directly, both in our Boutique in Amsterdam and upon request. Contact us to discuss all possibilities and make a well considered choice with confidence.