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About Certified Diamond Network

Certified Diamond Network is a Parramatta bespoke jewellery studio led by Edward and Carl Swaab. Founder Edward Swaab is an award-winning master jeweller with more than four decades in the industry, and the business combines his hands-on design and manufacturing experience with specialist diamond and gemstone sourcing.

Rather than relying only on a fixed inventory, Certified Diamond Network uses a brokerage approach to source diamonds and coloured gemstones through trade suppliers. This allows clients to compare stones according to their own priorities for appearance, certification, rarity and budget before committing to a design. The team also places strong emphasis on explaining diamond characteristics so clients understand what they are paying for rather than relying purely on a brand name.

Bespoke engagement and wedding rings are a major part of the studio’s work, together with coloured-diamond and gemstone jewellery. Edward works directly with clients during the design process, and finished pieces are handmade through the Parramatta workshop. Typical custom projects take several weeks from consultation through manufacture, depending on complexity.

The business traces Edward’s jewellery career back to his apprenticeship, when his design skills received early industry recognition. That combination of technical making and creative design still defines the service today.

For customers seeking custom jewellery in western Sydney, Certified Diamond Network offers a specialist alternative to conventional retail: direct access to experienced designers, transparent gemstone sourcing and locally made pieces developed around the individual customer rather than a standard catalogue.

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Below is an overview of the jewellery services offered by this store.

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In-store shopping is ideal if you want to see pieces in person and compare options with guidance. Many jewellers can advise on fit, styling, care, and gift ideas while you browse.

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5 ★ (78 Google reviews) View on Google
  • Maroun Taouk 5 ★ 2026-07-22
    Carl and his father are two of the most lovely people you will ever met, very professional, very courteous and down right a pleasure to have met.nnFrom start to finish, they were incredible, to showing example diamonds, ideations, draft custom free hand drawings and eventually a master piece engagement ring.nnThank you so much Carl and Team, we are signing your praises and will look to have our wedding bands made with you.
  • Sofie Saltau 5 ★ 2026-02-07
    If youu2019re looking for a personalised engagement ring, stop looking as this is the place!!nCertified Diamond Network hand created my engagement ring and I am obsessed!nCarl delivered an exceptional experience from start to finish. My fiancu00e9 Nick is still raving about it! From the initial design drawings to selecting the perfect diamond and collecting the finished piece, the process was flawless.nI am completely in love with my ring. The craftsmanship is impeccable and the setting is my favourite part, i have never seen anything like it before! It makes it so much more special.nWe will definitely be returning for our wedding bands and I am so excited to experience the whole process together!nThank you so much Carl!nForever grateful, Sofie & Nick
  • Debra 5 ★ 2026-03-09
    From my first conversation with Carl, I was very impressed with his professionalism and expertise. I was searching for a very special gem to be made into a pendant in memory of my dear mother. I was quite specific with the type of gem and shape. I did think I was asking a lot of Carl to locate exactly what I was looking for. However, Carl did not give up, and he was able to locate exactly what I had hoped for. The gem was perfect!nAfter talking with Carl and Edward about the design of the pendant, Edward created several beautiful design concepts to complement the gem. Both Edward and Carl took the time to explain how the beauty of the gem can best be highlighted and a final decision was made. I knew and trusted something very special would be created by Edward. I was not disappointed. The final product was stunning and perfect. Just what I had envisioned.nThis entire process was undertaken via the phone and email, as I live interstate. I was initially concerned about starting this process and not being able to meet in person, but Carl made regular phone calls to keep me informed and sent photos throughout, so it wasnu2019t a problem.nI hope to one day meet Carl and Edward in person to thank them for creating a very special and precious pendant. Their expertise, professionalism and attention to detail throughout the process were of the highest standards. They are masters at what they do and together they have created a family business built on showing genuine customer care and achieving perfection.nI highly recommend and trust Carl and Edward to advise, source and create a very special, bespoke piece of beautiful jewellery for you.nThank you, Carl and Edward, for my treasured pendant, and the amazing journey we have shared together.

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