Certified Diamond Network Certified Diamond Network is one of the leading Jewellers in Parramatta, offering the highest quality engagement rings, wedding rings, wholesale diamonds, and custom jewellery made by hand. If you are looking for a custom engagement ring that stands out from the crowd at an affordable price, call us today on Tel: (02) 9689 3396. Certified Diamond Network is the premier Jewellery Stores in Parramatta and a trusted Parramatta Jewellery Store known for exquisitely handmade custom jewellery of the highest quality. We specialise in diamond engagement rings and diamond wedding rings, but also design and create a wide assortment of other jewellery styles. Every piece is meticulously crafted by hand in our design studio, giving us full control over the quality of our creations. For almost two decades, we have been delivering exceptional jewellery not only in Sydney but across Australia. As a reputable Parramatta Jewellery Shop and Diamond Dealer Parramatta, we ensure every client receives a unique design tailored to their style. If you are searching for an engagement ring or wedding ring that is truly one-of-a-kind, speak to our expert jewellery designers today and call us on Tel: (02) 9689 3396.