Round Cut Lab Grown Diamond Engagement Ring
A round brilliant lab-grown diamond engagement ring in 18K solid gold. The round brilliant has 57 or 58 facets and is engineered to return more light to the eye than any other diamond shape, set in a hand-finished, hallmarked Riyanika setting.
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A round brilliant engagement ring is the right choice when anyone who wants maximum sparkle and a timeless silhouette that will not date. The shape sets the entire visual character of the ring, and the round brilliant is one of the most distinctive choices you can make.
The round brilliant has 57 or 58 facets and is engineered to return more light to the eye than any other diamond shape. It is the most-bought diamond shape in the world for a reason. Nothing else sparkles like it.
Best settings for a round brilliant centre stone
Four-prong shows more of the diamond and lets in more light. Six-prong is slightly more secure and has a more traditional look. A solitaire lets the round brilliant do everything; a halo adds a frame of smaller diamonds and makes the centre look 25–30% larger; a three stone setting flanks the centre with two accent diamonds.
What to expect on the finger
A 1 ct round brilliant is about 6.5mm in diameter. Most Riyanika customers choose between 1 ct and 2 ct for a round brilliant centre. Lab-grown diamonds give you the same brilliance as a mined diamond at roughly 40–60% of the price, which means you can comfortably size up the centre stone.
Lab-Grown Diamond centre stones
Every centre stone above 0.30 ct is GIA-certified and laser-inscribed with its grading report number. Every ring is built in 18K solid gold (yellow, white or rose), hand-finished and hallmarked in our workshop. For the full lab-grown diamond engagement ring range across all shapes, see our main lab-grown diamond engagement ring collection.
What comes with the ring
The original GIA grading report, a formal appraisal for insurance, one free resize within 60 days, and lifetime cleaning and prong checks. Every ring ships in a signature Riyanika box.
Bespoke
Not seeing the exact combination you want? Every Riyanika engagement ring can be made bespoke at no extra cost. Start your design here and we will send a CAD render for your approval before any gold is cut.
Frequently Asked Questions
How big does a 1 ct round brilliant diamond look?
A 1 ct round brilliant is about 6.5mm in diameter. On an average size 6 finger this reads as a confident, well-proportioned centre stone.
Is a round brilliant diamond more expensive than a round?
Round brilliants are typically 15–25% more expensive than fancy shapes at the same carat and grade because more rough diamond is wasted in the cutting process. The trade-off is the unmatched sparkle of the round cut.
What setting works best with a round brilliant cut?
Four-prong shows more of the diamond and lets in more light. Six-prong is slightly more secure and has a more traditional look. A solitaire is the most popular for letting the shape speak for itself; a halo is the most popular for making the centre look larger.
Are lab-grown diamond round brilliant diamonds GIA-certified?
Every centre stone above 0.30 ct is GIA-certified and laser-inscribed with its grading report number.
Can I customise this ring?
Yes. Every Riyanika engagement ring can be made bespoke at no extra cost on most designs. We will send a CAD render before any gold is cut.
How do I care for a round brilliant engagement ring?
Clean at home once a month with warm water, mild washing-up liquid, and a soft toothbrush. Bring the ring in once a year for a professional clean and prong check (free for life at Riyanika). Take the ring off for the gym, swimming, and gardening.