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Round Cut Engagement Rings

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Round Cut Engagement Rings — Timeless, Forever.

Timeless, brilliant and universally adored — a round cut engagement ring is a style icon perfect for those who treasure elegant, enduring beauty. With its 58 symmetrical facets, the round cut’s sparkle is unmatched, making it one of the most versatile shapes 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.

Find Your Perfect Round Cut Engagement Ring with Cullen

Cullen specializes 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 jewelers 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, carbon-neutral lab-grown diamonds, as well as sustainable lab-grown moissanite or sapphires — so you can feel confident your ring is as ethical as it is breathtaking.

Need a little guidance? Don’t hesitate to contact us or book a one-on-one appointment with one of our friendly engagement ring specialists to start exploring our collection of round cut engagement rings available to ship across the United States.

Looking for a specific style? Choose from our collections below:

A round cut diamond is a circular-shaped stone featuring 58 facets, cut with precision that allows each angle to reflect the maximum amount of light. This design creates a dazzling display of brilliance and is widely recognized as the shape that delivers the most sparkle.

Round cut diamond engagement rings are universally admired for their timeless elegance and versatility. Their iconic round shape and dazzling sparkle appeal to those who appreciate classic, beautiful design. The circular shape flatters any finger and suits a variety of settings, from classic solitaires to intricate halo designs.​ Engagement rings with round cut center stones are ideal for someone seeking a design that will never go out of style.

Generally, round cut diamonds can be more expensive per carat as the most diamond rough is lost during the cutting process. Virtually indistinguishable from mined diamonds, a round cut lab diamond can be an excellent choice for engagement rings and other jewellery while being more ethical, sustainable, and affordable.

The price of rings with round cut centre stones at Cullen varies based on factors such as the chosen gemstone, carat weight, and setting design. We offer a range of designs to suit different budgets, and our team can help you find or create a ring that meets your preferences and price point.​ For specific requests, such as the price of 2ct round cut engagement rings or photos of round cut engagement rings on a hand, please contact our friendly client service team.

Yes, we offer complimentary resizing for all our engagement rings. If your ring doesn't fit perfectly, simply contact us, and we'll adjust it to ensure a comfortable fit.​

All gold and platinum jewellery from Cullen comes with a lifetime manufacturing warranty. This warranty covers any defects in materials or workmanship, giving you peace of mind that your ring is crafted to the highest standards.​