Brought to life by our in-house jewellers.
Timeless, brilliant and universally adored — a round cut engagement ring is a style icon perfect for those who treasure elegant, enduring beauty. With its symmetrical, 58-facet cut, the round cut’s sparkle is unmatched, making it the most versatile shape for a wide range of settings. Suitable for solitaires, halos, vintage and modern designs alike, a round cut engagement ring is a classic choice that will never go out of style.
At Cullen, every round cut ring is handcrafted in our Australian workshop using ethically sourced materials and lab grown gemstones. Explore the collection online or begin your journey in-store with a personalized design consultation — whatever the process, we're here to help you cherish your forever love with the ring of your dreams.
Cullen specialises in custom-made round cut engagement rings, handcrafted to mark one of life’s most meaningful moments in a style unique to your love.
Widely admired for their enduring beauty and timeless, brilliant sparkle, round cut rings are an exquisite option for those who value elegance, sophistication, and iconic design.
Whether you’re seeking a sparkling solitaire or a vintage-inspired halo, our experienced in-house jewellers and knowledgeable client advisors will guide you through every step of the journey — from concept to completion.
Each ring is made in our Australian workshop using conflict-free and carbon-neutral lab-grown diamonds, as well as sustainable lab-grown moissanite and sapphires, so you can feel confident your ring is as responsible as it is exquisite to look at.
Need a little guidance? Don’t hesitate to contact us or book an in-person appointment with one of our friendly engagement ring specialists to begin exploring our collection of round cut engagement rings in New Zealand.
Looking for a specific style? Choose from our collections below:
Leah
Start by selecting your stone, metal, setting and ring size. Unsure of the size? Here are some handy tips to guide you.
Select your stone preferences to see recommended options.
Add an optional personal touch — type your message and choose a font to engrave names, dates or notes.
If you require your ring sooner, we have priority crafting options available. Select these options from the dropdown below.
| Avg. No. Side Stones | 38* |
|---|---|
| Avg. Carat Total Weight | 0.52* |
| Average Band Width | 2mm |
| Center Stone Size | 8mm - 2.00ct** |
* The average carat total weight and number of stones is based on a ring of size M.
** Relates to size of center stone shown in product images. Center stone size may vary in lifestyle images and videos.
This ring can be resized up to 2 sizes up or 1.5 sizes down
Cullen Jewellery offers free express shipping for all Australian orders and for international orders over 650 NZD. Every order is sent via insured express post, ensuring your special purchase arrives safely.
Delivery Time Estimates (once your order is completed)
Australia: 2-5 Business Days
New Zealand: 2-5 Business Days
USA: 6-10 Business Days
Rest of the World: 7-10 Business Days
Crafting a piece is only one part of the journey. Before a ring is made, it's imagined. Every design begins as a thought - inspired by a passing trend, a timeless silhouette, or the wish of a client searching for something deeply personal. From there, sketches are drawn, refined, and reimagined until a story begins to take form.
Personalise your ring with the diamond and precious metal that feels most like you - from 18k Yellow, Rose or White Gold to Platinum, all nickel-free and hypoallergenic. We work exclusively with lab-grown diamonds, identical in brilliance to mined gems but free from the environmental impact of mining. This allows every piece to balance timeless craftsmanship with innovation, sustainability, and individuality.
Every Cullen ring undergoes a meticulous multi-stage process - casting, polishing, cleaning, and 50x microscopic inspections by dedicated quality control specicialists - to ensure flawless crafstmanship and lasting brilliance. Any piece that falls show of our standards is immediately rectified by our in-house jewellers.
Once you've found the engagement ring of your dreams, the next step is to pair it with one of our wedding rings. Each piece is custom-matched to sit flawlessly alongside your engagement ring for an elegant set designed to last a lifetime.
Receive custom engagement ring guidance from our expert team in person and online.
Here's what our clients have to say about their Cullen experience.
We provide industry-leading guidance on fine jewellery and in-depth education for lab grown diamonds and moissanite stones, along with the anatomy of an engagement ring.
Crafting of your ring typically takes 50 business days, with expediting options available if you need it sooner. The exact completion date can be conveniently found on each product page. Please note that shipping is not included within this date and you can find all our shipping information here. For all timeframe information please visit our crafting timeframes page.
If you need help selecting from our range of diamond engagement rings or lab grown engagement rings, please contact us. Our team, experienced in both lab created diamonds and moissanite, will assist you.
Cullen Jewellery offers a Lifetime Manufacturing Warranty on all our rings, including engagement, wedding and fashion rings, giving you confidence and peace of mind with every purchase. For all other fine jewellery pieces, such as earrings, chains, pendants, bracelets and more, we provide a 2-Year Manufacturer Warranty. View our full warranty details.
Yes! At Cullen Jewellery, we offer free international shipping on all orders, including those for the perfect diamond engagement ring. Shop online and add your chosen piece to your shopping bag with ease.
Import Duties and Taxes
Most of our orders are sent as DDP (Delivery Duty Paid - this means import duties & taxes are covered). However, there may be cases where you may have to pay local import taxes and duties, which Cullen Jewellery does not cover, as some countries do not allow us to pay them as the sender. For more details, please check our Shipping page or contact your local customs agency.
Our showroom, featuring a range of lab grown diamond rings and moissanite pieces, is open by appointment only. Discover our collection of lab grown diamond engagement rings and moissanite in person or online.
At Cullen Jewellery, we offer free ring sizers for our entire range. Measure your ring size comfortably at home for that perfect fit.
Absolutely! We understand that many of our products are purchased as surprise gifts for events such as an engagement. For this reason, we use subtle packaging that will not give away the contents of the package.
Please let us know if we can help you in any other way to keep your purchase a surprise!
At Cullen Jewellery, we accept payments via direct debit, cash (Melbourne only) or card. If you are looking for an extended payment plan, we also offer interest-free finance via Humm.
At Cullen Jewellery, we value the craftsmanship and dedication involved in making each unique piece of special occasion jewellery. Therefore, we do not offer refunds/returns or exchanges unless the item is faulty or damaged. Please see our Returns Policy for more information.
Absolutely! At Cullen Jewellery, we offer One Free Resize for engagement and wedding rings to use within the first 12 months of your ring's completion (subject to eligible design style/metal type).
*There are certain resizing restrictions for each ring design. The specific information can be found on the product page of each ring. Read more about resizing.
