We pride ourselves on sourcing some of the most extraordinary diamonds for sale in Sydney. Every gem in our collection is hand-selected for its remarkable quality and character. From rare hues to unique cuts that showcase each stone’s individuality, find diamonds that not only captivate but also tell a story.
Master jewellers bring each diamond masterpiece to life in our on-site studio. The result is a creation with unrivalled light performance that will get noticed and endures as a meaningful heirloom for generations to come.
If you’re unsure where to start, we’re here to guide you. We help you compare options, assess important properties and ultimately choose diamonds that feel right for you.
Request My Free Quote
Discover the personalised experience that Certified Diamond Network offers by requesting a free quote today. Whether you’re envisioning a custom-made engagement ring or a bespoke piece of jewellery, our Parramatta jewellers are here to help.








Diamonds have unique physical properties such as unmatched hardness, high strength & durability, high reflectivity & refractivity, excellent thermal conductivity, and electric insulation. Diamond is one of the allotropes of pure carbon.
Diamond’s unique optical and physical properties give it the highest possible lustre of any transparent gemstone. Diaphaneity refers to a mineral’s ability to transmit light, and no other gemstone will display a diamond’s unique light performance qualities.
To select knowledgeably, you need to understand the basics of diamond grading and their impact on price due to rarity. In order of price impact is; Shape, Weight, Cut (Proportion, Polish, & Symmetry), Clarity, Colour, and Fluorescence.
Diamonds symbolise love, commitment, strength, purity, and eternal beauty. They are popularly chosen for engagement & wedding ring jewellery due to their hardness, durability, and longevity when worn daily.
Diamonds were formed long ago, roughly 1 billion to 3.5 billion years ago (up to 75% of the earth’s age). Diamonds are the hardest natural substance known to man and like any gemstone, each have their unique identifying fingerprint.