Round Diamond Engagement Rings
A round brilliant carries 57 to 58 facets engineered for one job: returning the maximum possible light to your eye. No other diamond shape sparkles harder, which is why rounds remain the most chosen centre stone for engagement and wedding rings alike — and, carat for carat, the most expensive to cut, since more rough is lost shaping a round than any other outline. Our round cut engagement rings run from $592 to $9,808, with 723 designs to choose from.
Round engagement ring styles
The round brilliant works in every setting we make: solitaires that let the stone speak alone, halos that push the sparkle wider, three-stone designs, pave bands, protective bezels, six-prong crowns and vintage-inspired settings with milgrain detail.
Why a lab-grown round
Because rounds command the highest price per carat, the lab-grown saving is largest here — a round diamond ring with the same fire and hardness as mined, graded to the same IGI standards, at a fraction of the price per carat.
Shop with confidence
Every ring is made to order in about 2 weeks in solid 10K, 14K or 18K white, yellow or rose gold, then delivered with free 5-7 day express shipping. 30-day free returns and IGI certification on every conflict-free stone.
Princess Lab Grown Diamond Halo Engagement Ring
Princess Lab Grown Diamond Split-Shank Engagement Ring
Princess Lab Grown Diamond Halo Engagement Ring
Princess Lab Grown Diamond Halo Engagement Ring
Princess Lab Grown Diamond Pave Engagement Ring
Princess Lab Grown Diamond Halo Engagement Ring
Princess Lab Grown Diamond Side-Stone Engagement Ring
Princess Lab Grown Diamond Side-Stone Engagement Ring
Princess Lab Grown Diamond Side-Stone Engagement Ring
Princess Lab Grown Diamond Halo Engagement Ring
Princess Lab Grown Diamond Pave Engagement Ring
Princess Lab Grown Diamond Side-Stone Engagement Ring
How to choose a round diamond
With rounds, cut grade is the whole game. Two stones with identical carat, colour and clarity can look completely different if one is cut deep to save weight — the extra carats hide in the belly where you cannot see them. Insist on an Excellent or Ideal cut grade; it is the one line on the certificate that most changes what your eye receives.
Practical numbers: a well-cut 1-carat round faces up about 6.4mm across, a 1.5-carat about 7.4mm, a 2-carat about 8.1mm. Table percentage between 54–60% and depth between 59–62.5% is the sweet zone — outside it, brightness drops. If a stone is priced surprisingly low for its weight, check the depth first; that is usually where the discount is hiding.
Round diamond FAQs
Why are round diamonds more expensive than other shapes?
Cutting a round brilliant loses up to 60% of the rough crystal — more waste than any other shape — which is why round diamonds carry the highest price per carat. Lab-grown pricing softens that premium considerably.
What wedding band pairs best with a round engagement ring?
Almost anything: straight bands sit flush against most round settings, and curved bands hug a halo. Many couples match round wedding rings and engagement rings in the same metal for a seamless stack.
What is a 3 stone round engagement ring?
A centre round diamond flanked by two smaller stones — often rounds or pears — symbolising past, present and future. Browse our three-stone settings above.
Are round lab grown diamonds real diamonds?
Yes. A round lab grown diamond is chemically and optically identical to a mined one, graded by IGI to the same standards. The FTC classifies both as real diamonds.
Is a round solitaire or halo better?
A round solitaire engagement ring maximises the stone itself; round halo engagement rings maximise perceived size and sparkle. Solitaires pair with any band and never date; halos deliver more presence per dollar. Neither is wrong — it is a taste call.
What does “brilliant” mean in a round diamond?
It names the facet pattern: brilliant round diamond engagement rings use the 57–58-facet brilliant cut, engineered for maximum light return — as opposed to step cuts like the emerald, which flash instead of sparkle.