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How to choose a diamond
Begin with cut quality, certification, shape, millimetre dimensions, and the relationship between the stone and the future setting.
Diamond Education for Engagement Ring Diamonds in Montreal
Atelier RMR diamond guides
Choose the stone before designing the ring.
Choosing a diamond is a technical decision before it becomes an emotional one. Atelier RMR's diamond guides are designed for clients in Montreal who want to understand the stone itself: how it is graded, how it performs in light, how it appears on the hand, and how it should relate to a future custom engagement ring.
Here, you can compare GIA and IGI certification, study the 4Cs with more precision, and understand how diamond shapes influence brilliance, proportion, setting design, and visual presence. The guides also examine natural diamonds and lab-grown diamonds with the same level of care, so each choice can be considered through origin, value, rarity, size, and long-term meaning.
Certification
GIA, IGI and diamond reports
A laboratory report becomes useful when it is read beyond the headline grade: proportions, comments, fluorescence, and value context.
Compare GIA and IGIOrigin
Natural or lab-grown diamonds
Compare origin, rarity, budget, visual presence, certification, and personal meaning with the same level of care.
Compare the optionsShapes
Oval, radiant, round and other shapes
Shape influences brilliance, hand presence, setting architecture, and the overall balance of the ring.
Size and proportions
Carat, millimetres and visual presence
Carat weight does not explain everything. Millimetre dimensions, depth, table, and ratio often determine perceived size and the elegance of the diamond.
View the diamond size chart
Shape and presence
Shape changes the light, not only the silhouette.
Oval, pear, marquise, radiant or halo: each shape changes brilliance, perceived size, setting height and the way the ring sits on the hand. An atelier comparison makes those differences visible before selecting the centre stone.
Diamond consultation
Bring the certificate. We will read beyond the grade.
In a private consultation, Atelier RMR can compare GIA or IGI reports, explain proportions, clarify the trade-offs between natural and lab-grown diamonds, and select the stone around which the ring will be designed.
Book a private diamond consultation
Compare before choosing
Natural or lab-grown, chosen with intention.
Compare origin, apparent size, certification, budget and personal meaning with a jeweller before selecting the centre stone.
Compare diamond options
Stone selection
Create the ring around the right diamond.
Once the centre stone is selected, Atelier RMR designs the setting around its proportions, silhouette, height and daily-wear requirements.
Plan a private consultation
Frequently asked questions
Essential questions before choosing a diamond.
These answers help compare certification, origin, shape, size and proportions before selecting the centre stone for a custom engagement ring.
What is the best way to choose a diamond for an engagement ring?
Start with cut quality, certification, shape, millimetre dimensions and setting compatibility. The best diamond is not always the largest, but the one with the strongest balance of light, proportion and design fit.
Is GIA better than IGI for diamond certification?
GIA is often treated as the stricter reference for natural diamonds, while IGI is widely used for lab-grown diamonds. Either report should be reviewed beyond the headline grades.
Are lab-grown diamonds real diamonds?
Yes. Lab-grown diamonds have the same chemical composition as natural diamonds. The main differences are origin, rarity, pricing and long-term value perception.
Should I choose a natural or lab-grown diamond?
Choose natural if rarity, geological origin and tradition matter most. Choose lab-grown if visual size, budget efficiency or a higher colour and clarity combination is the priority.
Which diamond shape looks largest?
Elongated shapes such as oval, pear, marquise and some radiant cuts often appear larger than round diamonds of similar carat weight because they create more finger coverage.
What diamond shape is best for a custom engagement ring?
There is no universal best shape. Round diamonds offer classic brilliance, ovals create length, radiants feel architectural and bright, emerald cuts emphasize clarity and line, and cushions create a softer presence.
How important are the 4Cs when choosing a diamond?
The 4Cs are essential, but they should be read together. Cut quality, proportions and face-up appearance often have more visual impact than a single grade on paper.
Can Atelier RMR help compare diamond certificates in Montreal?
Yes. In a private consultation, Atelier RMR can review GIA or IGI reports, compare proportions, explain trade-offs and help select a stone suited to the final ring design.