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What is the right size for a gemstone? Visual guide and tips

This is a question that often comes up, especially when it's time to choose an engagement ring. Giving or treating yourself to a gemstone isn't just about carats. Size, shape, and proportions influence both the brilliance and the presence of the jewel. This visual and practical guide will help you understand the importance of the cut of a diamond or other gemstone, and help you ask the right questions before making your choice.

Carat: Weight does not always rhyme with the size of a stone

When we talk about a gemstone's carat , we often refer to its size and prestige. However, a carat is not synonymous with its apparent size. It is a unit of weight: 1 carat is equal to 200 milligrams. This is why two round 1-carat diamonds can appear slightly different to the naked eye.

This is where the stone's cut comes into play. Its depth, shape, and proportions directly influence its visual appearance. A stone cut too deeply will appear smaller on the surface. Conversely, a cut that's too spread out will appear larger but may lose its brilliance. A well-proportioned round brilliant diamond , with its famous 58 facets, offers a perfect balance between sparkle and size.

Flamme en rose Tip: Don't rely on carats alone. A well-cut stone will capture everyone's attention, regardless of its weight.

Examples of round, princess, oval and marquise cut diamonds

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The shape and proportions of the gemstone

Certain gemstone shapes have a knack for appearing larger. Elongated cuts like the marquise, oval, and pear cut maximize the visible surface area. The result: these stones appear larger than a round diamond of the same carat. This is a visual effect that many people seek, especially for engagement rings .

But the magic doesn't stop there. Consider a sapphire and a diamond of the same carat. On a ring, the sapphire may visually appear larger than the diamond. This isn't a matter of actual volume, since the sapphire is actually denser than the diamond, and therefore slightly smaller in volume for the same weight. Rather, the illusion stems from the way colored stones like the sapphire are cut. Jewelers often choose a wider table (the top side) to better showcase the depth of color. This approach makes the stone appear larger than a round brilliant diamond of the same carat, whose cut is primarily optimized to maximize sparkle and light dispersion.

Flamme en rose Tip: Want a stone that really stands out? Consider elongated cuts or colored stones with a generous table cut. You'll achieve a truly grandiose effect without increasing the carat weight.

The exquisite

1 ct oval cut diamond

Miracle

Round cut citrine of 6.5 mm

Romance

1.07 ct Emerald Cut Diamond with Halo

Darling

0.30 ct cushion cut diamond with halo

The ideal size for a ring

Of course, tastes vary. To help you make an informed choice about the ideal size, our jewelers advise you to match the gemstone size to the jewelry's style and your personality. Here are some inspiring guidelines.

A solitaire typically features a round brilliant or cushion-cut diamond of 0.5 to 1.5 carats, depending on the desired effect. A stone over 1.5 carats will create a dramatic look, provided the proportion of the gemstone remains balanced with the band. Halo rings allow for a slightly smaller center stone, ranging from 0.4 to 1 carat, with the halo amplifying the effect of size and brilliance.

Oval and marquise cuts are particularly popular for their elongated effect, which gives the impression of a larger stone. For a harmonious look on a ring, we generally favor stones from 0.75 to 1.5 carats, which means from 9 x 6 mm to 12 x 8 mm. They offer a beautiful balance between presence and elegance on the finger.

Flamme en rose Tip: Before choosing, consider not only the size of the stone but also its shape, its brilliance, and how it will complement your style and body shape.

VISUAL GUIDE
Discover the stone you need

Round size

Cushion size

Oval cut

Marquise size

Princess cut

Emerald cut

Choose a stone that enhances you

For a gemstone to reveal its full beauty, it must harmonize with the hand that wears it. Choosing a gemstone that's well-suited to the shape of your fingers will make all the difference.

  • Long, thin fingers: Almost anything goes. Elongated gemstone shapes like oval, marquise, or emerald cuts are particularly popular.
  • Short or thicker fingers: Choose medium-sized round, cushion, or oval shapes. Avoid stones that are too wide or too high, which could visually shorten the hand.
  • Wide fingers: Opt for generous stones (1 to 2 carats) or halo rings. Larger proportions of gemstones bring a beautiful balance to the overall look and enhance the silhouette of the finger.

Flamme en rose Tip: Our jewelers always recommend experimenting with different styles. Sometimes a well-chosen pear or princess cut creates an unexpected and flattering effect, even if your finger shape doesn't indicate it.

Chouchou

0.30 ct pear-cut diamond with halo

Cherrish

1 ct marquise cut diamond

Your little smile

Round cut diamond of 0.25 ct

Romance for two

7x5 mm emerald cut emerald and halo

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Comfort and care of a precious stone

While a gemstone cut is a dream, you also have to think about the practical aspects, especially for a piece of jewelry that you wear every day.

First, the weight: A large stone naturally adds volume to the ring. In the case of a ring with a large stone, a band that is too thin could cause it to become unbalanced, turn on the finger , or even exert unpleasant pressure.

Next, maintenance: Even though diamonds are one of the hardest stones in the world, they are not immune to everything. Regular cleaning with warm, soapy water and a soft-bristled brush will preserve their shine. Also, remember to have the setting checked annually, especially if you wear your jewelry every day.

Flamme en rose Tip: Our jewelers always recommend adapting the design to everyday uses.

The essentials for choosing a piece of jewelry that reflects your image

Certain shapes create a visual impression of grandeur, which is particularly popular for engagement rings. Hand shape and everyday comfort should also guide your choice. Finally, a suitable setting and proper care will ensure your gemstone lasts for many years to come.

Need expert advice? Contact one of our jewelers via online chat, phone, videoconference, or visit our jewelry store in downtown Montreal. We will guide you with passion and care in choosing your gemstone.

FAQ - Frequently Asked Questions About Gemstone Size and Carat

What is the cut shape that makes a stone appear larger?

Elongated shapes such as marquise, oval or pear maximize the visible surface area and create an effect of grandeur.

What is the difference between carat and cut of a gemstone?

Carat measures the weight of the stone while cut determines its shape, proportions and visual appearance.

Can the size of a gemstone affect its comfort in everyday life?

Yes, a very large or poorly balanced stone can hinder certain movements; the choice of setting and design therefore plays an essential role in ensuring comfort.