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The round brilliant is the most popular diamond shape in the world — about 60% of engagement rings — and the brightest, thanks to 57 to 58 facets engineered to return the maximum light to the eye. It is the benchmark every other shape is measured against. Here is why, and how to choose one.
The round brilliant is the most brilliant shape — 57–58 facets engineered to return the most light, which is why it is the classic and the sparkliest choice. It costs more per carat than fancy shapes because it wastes more rough in cutting, so cut quality is everything: every Montare round is Triple Excellent.
Key takeaways
- The round brilliant returns the most light of any shape — maximum sparkle.
- It is the most forgiving, hiding minor colour and inclusions in its flash.
- It commands a price premium because cutting one wastes more rough.
- Cut grade matters most of all — a round lives or dies by its proportions.
- It suits every hand and every setting — the safe, timeless classic.
What is a round brilliant?
The modern round brilliant is a triumph of optics: its 57 (or 58, with a tiny culet) facets are arranged at precise angles so light entering the top reflects internally and returns through the top as brilliance and fire. No other shape returns light as efficiently — which is why ‘round’ and ‘sparkle’ are almost synonymous.
Why it is the most popular
Three reasons: it sparkles the most, it suits everyone, and it is endlessly classic — no one ever regrets a round. It is also the most forgiving shape: its intense brilliance helps mask minor inclusions and a touch of body colour, so it looks superb across a range of grades. If you are unsure what to choose, choose round.
Every centre diamond is Triple Excellent, D–E, VVS and at least three carats — the hard calls are made for you.
Design your ringWhy rounds cost more
A round brilliant is cut from a rough crystal with significant waste — more of the rough is polished away than for most fancy shapes — so you pay for the lost material as well as the precision. Fancy shapes (oval, emerald, cushion) retain more rough and therefore often offer more size per carat for the budget. With round, you are paying for unrivalled brilliance.
Cut is everything
More than any shape, a round brilliant is only as beautiful as its cut. The same carat, colour and clarity can look dazzling or dull depending on proportions — which is exactly why Montare's floor is Triple Excellent. See why Triple Excellent matters and the overview in the 4Cs explained.
The best settings for a round
Everything suits a round: a solitaire for timeless simplicity, a hidden halo for extra sparkle and size, a three-stone for meaning, or pavé shoulders for added brilliance. Explore our guide to settings and compare shapes in our visual guide.
Rounds and the Montare standard
Every Montare round is lab-grown, D–E colour, VVS1–VVS2 clarity, Triple Excellent, three carats minimum, IGI certified — the standard that lets a round do what it does best. Design one in the ring builder or book a consultation.
Every Montare round is hand-selected and set to one fixed standard — D–E colour, VVS clarity, Triple Excellent cut, three carats minimum, IGI certified.
See round rings →Frequently asked questions
Why is the round brilliant the most popular shape?
It returns the most light of any cut, suits every hand, and is endlessly classic — about 60% of engagement rings are round.
Do round diamonds sparkle the most?
Yes. The round brilliant's 57–58 facets are engineered for maximum light return, so it sparkles more than any other shape.
Why are round diamonds more expensive?
Cutting a round wastes more of the rough crystal than most fancy shapes, so you pay for the lost material and the precision — you are buying unrivalled brilliance.
What setting is best for a round diamond?
All of them — a round suits a solitaire, hidden halo, three-stone or pavé equally well, which is part of its timeless appeal.
See a round to standard. Build one in the ring builder or book a consultation.
The Montare standard
Lab-grown · D–E colour · VVS clarity · Triple Excellent · 3ct minimum · IGI certified
Every ring is made to order in Toronto and backed by our lifetime setting upgrade, with free, fully insured shipping.
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