

Fine Jewellery design
Sydney jeweller, Mark Nathan, a second-generation jewellery designer, has been creating timeless engagement rings and diamond jewellery pieces for over 25 years.
Mark designs exquisite diamond engagement rings, dress rings, earrings, pendants, necklaces, bangles and bracelets for women and men. Mark’s jewellery brings beauty and joy to every wearer.
Our Sydney showroom is based on Castlereagh Street, Sydney where Mark provides you with a personalised shopping experience and in-depth jewellery education.
When purchasing a diamond, clients can use a jeweller’s loupe to discover the 4 Cs of diamond grading – cut, colour, clarity, and carat weight – and view examples of each quality level.
To ensure the highest standards, every diamond we offer is certified by both the GIA and the DCLA laboratory, providing our clients with absolute authenticity and peace of mind.
Book an AppointmentDiamond Engagement Rings
Browse our extensive selection of custom designed diamond engagement rings, featuring classic solitaire rings, elegant halo designs, and much more.
Whether you’re searching for a timeless solitaire diamond ring that radiates simplicity and sophistication or a halo setting that adds an extra layer of sparkle, we offer a diverse range of jewellery to suit every taste and occasion.
Our collection includes expertly crafted styles that enhance each diamond’s natural brilliance, ensuring you find the perfect piece of jewellery to reflect your unique style and sentiment.
View All RingsWedding Rings
We offer a stunning range of wedding rings in both contemporary and classic styles, designed to celebrate your unique style and story.
From sleek, modern bands to timeless, elegant designs, our collection caters to all tastes and preferences.
For those seeking a truly personalised touch, our expert Sydney jewellers can craft a custom designed wedding ring that reflects your vision.
Whether you imagine a traditional band or a distinctive design that captures your personality, we’re dedicated to creating a ring that beautifully represents your journey together.
Fine Jewellery
Explore our extensive collection of fine jewellery in our Sydney showroom or online, featuring everything from sparkling diamond earrings and elegant bracelets to bespoke custom-designed dress rings.
Whether you’re looking for timeless diamond studs, a sophisticated bracelet to add a touch of luxury, or a unique set of custom cufflinks, we offer a wide selection to suit any style and occasion.
Each piece is crafted with meticulous attention to detail, ensuring you find the perfect accessory for any outfit or create a memorable gift for a loved one. Discover jewellery options that embody elegance and bespoke craftsmanship in every detail.


Mark Nathan
Mark’s passion for jewellery began at just ten years old, when he started polishing gold at his father’s jewellery workshop.
His father, a skilled diamond setter who began his career in Hatton Garden, London’s renowned jewellery district, went on to establish his own jewellery business in The Strand Arcade, creating a legacy that Mark proudly continues today.
With over 25 years in the jewellery industry, Mark upholds his family’s long-standing tradition at his Castlereagh Street, Sydney location—Sydney’s iconic jewellery precinct.
Here, Mark brings his expertise in jewellery design and diamond wholesale directly to clients, offering a unique “upstairs jeweller” experience that combines quality with value.
By operating outside the traditional retail setup, he keeps overheads low, allowing him to pass substantial savings on to his clients. At Mark Nathan Jewellery’s showroom, clients benefit from undivided attention and a relaxed, personalized setting.
This tailored approach not only ensures exceptional customer service but also enhances the overall shopping experience, making it both enjoyable and memorable.
Whether you’re seeking a custom-designed piece or selecting from his curated collection, Mark’s passion and commitment to excellence shine through in every detail.
See our Sydney showroom