Certified Diamond Network is the highly trusted brokerage service and diamond consulting of white and fancy colour diamonds in Sydney, Australia. With our expertise in the field, we make sure that we find the most beautiful gemstone for you. Having award-winning jewellery designers, we provide our clients with 100% handcrafted engagement rings and custom-made jewellery. We are the professionals that you should talk to when you're looking for unbiased diamond brokerage service and truly handcrafted jewellery.