At Harper Jewellery, we offer exceptional value without compromising on quality because we take a direct, personalised approach to sourcing your jewellery. As your dedicated Lab Diamond Jeweller, we work directly with master craftsmen and certified suppliers, cutting out the traditional middleman and the associated retail markups.

By eliminating these extra costs, we are able to pass the savings on to you, offering premium lab-grown diamonds and moissanite jewellery at a remarkably competitive price.

We are committed to providing you with luxurious, ethical jewellery that is both affordable and exceptional in quality. Each piece represents an investment in timeless craftsmanship, complemented by a bespoke private service tailored to your unique desires. From initial consultation to final creation, we provide expert guidance, ensuring a seamless and personalised experience that exceeds expectations every single time.

Lab-grown diamonds are real diamonds, created using advanced technology that replicates the natural diamond formation process. They possess the same brilliance, durability, and chemical composition as mined diamonds, but with a more ethical and sustainable origin. By eliminating the environmental and social concerns associated with traditional diamond mining, lab-grown diamonds offer a responsible yet equally luxurious alternative.

What sets our lab-grown diamonds apart is our commitment to exceptional quality and craftsmanship. Each diamond is carefully grown, cut, and polished to maximise its brilliance, ensuring only the finest stones make it into our collection. Designed for women who appreciate bold luxury and timeless elegance, our lab diamonds provide a refined, ethical choice without compromise. Whether for a bespoke engagement ring or an everyday statement piece, they are a symbol of modern sophistication and sustainability.

Yes, we specialise in bespoke lab diamond creations. As your private lab diamond concierge, we source, design, and craft one-of-a-kind pieces tailored to your vision.

Absolutely. Our Mosman showroom is available by appointment only for private viewings.

At Harper Jewellery, we take immense pride in the craftsmanship and quality of our pieces. As a testament to our commitment, we offer a lifetime workmanship warranty, covering any manufacturing defects in materials or craftsmanship.

If you believe your piece exhibits a manufacturing fault, you may return it to us for an inspection. Should we determine that the issue arises from a defect in workmanship, we will, at our discretion, repair or replace the item at no cost. Please note that repairs typically require 4–6 weeks to complete. This warranty extends to custom-made bespoke pieces as well.

Please see our warranty page for more information.

We offer a 30-days return window for change of mind on unworn, non-custom pieces in their original condition and packaging. Custom and made-to-order items are final sale unless faulty.

Yes, all lab diamond pieces come with a Certificate of Authenticity and an IGI Certificate.