See a round diamond engagement ring on hand
Whether you prefer a delicate one carat round diamond ring, a two carat round diamond beauty or a bolder three carat masterpiece, round engagement rings showcase the versatility of this classic design, making them a popular choice for romantic milestones. Play around with our carat weight widget below to see how different carat weights look in different shapes and styles on hand.
| Stone shape | 1 carat | 2 carat | 3 carat |
|---|---|---|---|
| Round | 6.4 x 6.4mm | 8.1 x 8.1mm | 9.4 x 9.4mm |
| Princess | 5.5 x 5.5mm | 7.3 x 7.3mm | 8.6 x 8.6mm |
| Emerald | 7 x 5mm | 8.5 x 6.5mm | 10 x 7mm |
| Asscher | 5.5 x 5.5mm | 7 x 7mm | 8 x 8mm |
| Oval | 8 x 5.5mm | 10 x 7mm | 11 x 8mm |
| Marquise | 10 x 5mm | 12 x 6mm | 14 x 7mm |
| Pear | 8 x 5.5mm | 10 x 7mm | 12 x 8mm |
| Heart | 6.5 x 6.5mm | 8.5 x 8.5mm | 10 x 10mm |
| Cushion | 6.5 x 6.5mm | 8 x 8mm | 9.5 x 9.5mm |
How does diamond carat weight impact round engagement ring price?
Because larger diamonds are more rare, the heavier the diamond, the higher the price. For example, a 1 carat round diamond would be valued higher than two 0.50 carat round diamonds of the same quality. In general, a doubling the size of your diamond can cost three to four times more.
Highly sought-after round diamond sizes can also carry a price premium. If you’re after a 1, 1.5 or 2 carat etc. we recommend buying just shy of these carat weights, which can result in savings.
You can often save around 10% by choosing a diamond that is around 0.10cts lower than the popular sizes. They’ll appear almost identical in size but won’t carry the same price tag. – Nikolay Piriankov, CEO at Taylor & Hart
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Expert Advice: How to choose the perfect round diamond?
Just because a diamond is bigger, doesn’t mean it’s better. The right diamond isn’t just based on one factor but a combination of all 4 Cs (carat, cut, clarity and colour). When choosing a diamond, focus on the quality that’s most important to you, then work to balance the remaining three.
Diamond Colour:
If you are looking at a white gold or platinum band, we would recommend colour grades of G-H. Opt for a colour grade between D (colourless) and G (near-colourless) for a mesmerising icy white diamond without unnecessary cost. If you are looking at a rose gold or yellow gold band, we would recommend a diamond with a colour range of G-J. The warm tones of the metal will offset any hints of colour in the diamond. The most frequent diamond colour we see amongst our customers is F. This is closely followed by E and G.
For the best overall value, a G-H diamond from the near colourless category is a great choice. The visible difference between these grades and grades in the colourless category is minor, but you could make huge savings. – Kate Earlam-Charnley, Design Director at Taylor & Hart
Diamond Clarity:
To be sure that your diamond can display its full fire and brilliance, we would recommend a SI1 clarity grade or higher. Aim for clarity grades like VS1 or VS2 (Very Slightly Included) for diamonds with minimal visible flaws to the naked eye. The most popular diamond clarity grade we see amongst our customers is VS1, closely followed by VVS2.
VS clarity grade diamonds offer the best value. They cost less than flawless diamonds, but still appear totally eye-clean, with great light performance and bright sparkle. – Alessandra Ranaglia, Head of Supply Chain at Taylor & Hart
Diamond Cut:
A diamond cut grade is only applicable to round shaped diamonds and affects how the diamond catches light and sparkles. Look for Excellent or Ideal cut grades for maximum brilliance.
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Round Diamond Engagement Rings
Best known for its brilliance, the round diamond has 58 angular facets divided amongst its crown, girdle and pavillion. Facets are the surfaces of a diamond that can be polished in order to refract and bounce light from the bottom of the diamond, back through the top, giving it unbelievable sparkle and brightness.
Also known as round brilliant, these diamonds have an iconic reputation, one that’s sure to impress.
Round diamond engagement rings have become an iconic, time-honored engagement tradition. It’s versatile circular shape that suits all styles and metals.
Round brilliant diamonds are the most popular shape for engagement rings, representing almost 75% of diamonds sold worldwide. Among our customers, over 50% choose a round diamond as their centre stone.
The popularity of a round brilliant diamond, paired with the amount of waste produced during its cutting process, does mean that these diamonds carry the highest premium.
A cut grade is exclusively given to round diamonds–and is the most important factor to consider when choosing a round shape.
For the greatest brilliance and fire, we recommend (and only offer) very good and excellent cut grades for round brilliant diamonds.
This term refers to the diamond’s proportions–specifically how the diamond facets interact with the light.
Hundreds of years have gone into perfecting the cutting process of round diamonds. For centuries, diamond cutters have followed scientific theories of light reflection in order to maximise the round diamond’s fire and brilliance.
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