How to Choose an Engagement Ring

Almost everyone arrives at a first appointment with a photo on their phone.

A screenshot from a friend's engagement post. A close up of her grandmother's hand, taken at a birthday lunch without anyone noticing. Sometimes a single saved image from years ago that has never been shown to another person.

That photo is worth more than any specification sheet, because it is the first real evidence about the person you are choosing for. Knowing how to choose an engagement ring starts there, with her, not with carat weight.

Start with the person, not the ring

Before shape, before metal, before any number on a grading report, three questions are worth answering honestly.

What does she wear every day without thinking about it? What does she take off the moment she gets home? What would she never wear again after the first month?

A ring that suits the person gets worn for decades. A ring that suits a trend gets replaced.

Two people can commission the same design in the same specifications, and only one of them ends up with a piece that looks like it was always hers. The difference is everything that happens before the design is drawn. Every piece begins with your story.

Let her jewelry answer half your questions

Open her jewelry box, or look closely at photographs.

Metal color. If everything she owns is yellow gold, a white gold ring can sit apart from the rest of her collection. Start with what she already reaches for.

Scale. Delicate chains and small studs usually point to a lower profile setting. Bolder pieces suggest she can carry more presence on her hand.

Detail level. Some people love ornament. Others want one clean line and nothing else.

Wear. Scratched, softened, slightly bent pieces tell you she does not take her jewelry off for anything.

The answers are already on her hands.

Choose the shape before you look at any numbers

Shape is the part she will see from across a room, and it is almost entirely emotional.

Round brilliants are the most familiar and the most classic. Ovals and elongated cushions read slightly larger for their weight and lengthen the finger. Emerald cuts are quieter and more architectural, and their long open facets show clarity more openly.

There is no correct answer here. It is a personal decision.

One practical note. A formal cut grade is assigned only to standard round brilliants, so fancy shapes such as ovals, pears and emeralds carry no official cut grade on a report at all. With those shapes, the eye of the person selecting the stone matters more than the paperwork.

Cut is the one thing you can see, and the one thing you cannot fix

If you learn one technical idea before choosing a diamond, learn this one.

Cut is not shape. Cut is how precisely the facets are proportioned, aligned and polished so the stone handles light. Three things your eye picks up directly: brightness, the white light reflected back to you. Fire, the flashes of spectrum color. Scintillation, the pattern of light and dark you see when the stone moves.

Color and clarity are described on paper. Cut is what makes a diamond look alive at a dinner table. There is more on how the 4Cs work together in The Art of Choosing a Diamond.

This is where knowing how to choose a lab-grown diamond diverges from reading a report. Two stones can carry identical color and clarity grades and look completely different in daylight, because proportions and finish are not fully captured by two letters and a number. A stone that carries its weight in depth rather than in face up spread will also look smaller than its carat weight suggests.

At IRALIS a diamond is never accepted on its certificate alone. Our gemologist hand-selects every stone and works only within the top 1% of lab-grown production. Diamonds that read beautifully on paper and fail in real light are rejected, whatever the grade printed on the report. Cut is the deciding factor.

What lab-grown diamond certification means in 2026

This part of the market shifted recently, and most articles online have not caught up.

IGI is the primary certification body for lab-grown diamonds, and the only major laboratory still applying the full traditional 4Cs to lab-grown stones. An IGI report gives you a specific color grade, a specific clarity grade, cut, polish, symmetry and measurements. For comparing one stone against another, that specificity is the entire point. Every IRALIS diamond from 1 carat comes with an IGI certificate.

GIA changed its approach on 1 October 2025. Instead of assigning individual color and clarity grades to lab-grown diamonds, it now places a stone in one of two descriptive categories, premium or standard. A stone that does not reach the minimum threshold receives no designation at all. Reports issued before that date remain valid, and GIA stones can still be sourced for you on request.

HRD Antwerp stepped away entirely. Since January 2026 the Antwerp laboratory no longer issues quality certificates for loose lab-grown stones intended for commercial sale.

So the three names are no longer interchangeable. Anyone presenting them as equivalent options today is working from outdated information. If you want a report with full 4Cs detail on a loose stone, that is IGI.

One more piece of vocabulary, since it appears on older pages and confuses people. The word "synthetic" is no longer a recommended descriptor, precisely because buyers tend to read it as "fake". These stones are diamond. Same crystal structure of tightly bonded carbon atoms as a mined diamond, with the same chemical, optical and physical properties, and by eye the difference is indistinguishable. If that is the part you want to understand properly, start with what a lab-grown diamond actually is and lab-grown versus mined.

Metal: what it does to the diamond, and what it asks of her

Metal is usually treated as a style question. It is also an optical one.

Diamonds graded D, E and F are colorless, and a white metal shows that colorlessness best. The color of the setting reflects through the stone, which is why yellow prongs on a colorless diamond can make it read warmer than it actually is. If she loves yellow or rose gold, white prongs on a warmer band solve this without compromising the look she wants.

Then there is how the metal ages.

White gold is an alloy, 14k or 18k, normally finished with a thin rhodium plating. That plating wears away gradually and needs renewing from time to time, and prongs on any ring should be checked periodically for movement. Platinum is denser and stronger than gold, which makes it a natural choice for a ring worn every day, and because it is less brittle than gold alloy its prongs are less likely to break.

Your piece is crafted in 14k or 18k recycled gold, with platinum available for engagement rings and bridal. Recycled gold is not a gesture here, it is the standard material, and our goldsmith is a member of the Responsible Jewelry Council.

Getting the size right without ruining the surprise

Ring size is where surprise proposals most often go wrong, and it is the easiest problem to solve quietly.

Borrow a ring she already wears on that hand and have it measured. Ask her closest friend or her sister, who almost certainly knows. Or work from the ring size guide and get the measurement in a way that never touches the conversation. Another way is to order our complimentary ring sizer.

If you are choosing together, the replica ring service exists for exactly this moment. You can wear a replica of the design before committing to it and see how it lives on your hand for a few days.

Fingers also change size with heat, cold, salt, altitude and the time of day. A ring measured at 7am in January is not the same ring measured after a summer flight. Sizing at the end of the day, at normal room temperature, gives the truest result.

Some designs, particularly full eternity styles and certain bezel settings, are far harder to resize once they are finished. Worth asking before the design is finalized rather than after.

Budget, said plainly

There is no rule about months of salary. That idea was invented to sell diamonds, and it has caused more anxiety than joy.

Decide what you are comfortable spending, then let the shape and the setting do the work rather than chasing a number on a certificate. A very well cut stone slightly under a round carat weight will almost always look better on her hand than a poorly cut stone slightly above it.

If it helps to spread the payment, three options are available: Twint Buy Now Pay Later up to CHF 1,000 per purchase, HeyLight up to CHF 5,000 with a 25% down payment and the remainder over 12 monthly installments, and Klarna Flexible Payments at checkout with terms arranged directly with the provider.

Give yourself more time than you think you need

Every piece is made to order. Nothing sits in a drawer waiting.

Production runs 2 to 10 weeks from confirmation to final handover, depending on the piece and the complexity of the design. Add the time it takes to have the first conversation, source the stone and settle the design, and a comfortable planning window is around three to four months before the date you have in mind.

If you have a fixed date, say so in the first conversation. Almost everything can be planned around a deadline. Very little can be rescued three weeks before one. When the date is very close, the Ready to Ship pieces are the shorter route.

What a consultation actually feels like

It starts with a conversation, in Zurich by appointment or over a virtual call.

Some people arrive with a Pinterest board and exact specifications. Others arrive with nothing but a feeling and the sentence "I'll know it when I see it". Both are perfect starting points, and neither is harder to work with than the other. Milena leads the conversation, learning about your life and the moment you want to capture, so that not only the stone is right, but also the feeling.

Once you decide to proceed, our gemologist sources an IGI certified stone matched to your brief. Milena works with him on your behalf and reviews the result, so what reaches you is a stone she has already chosen and stands behind. Every stone is judged on how it performs in real light, not only on how it reads on paper. Then the design takes shape, and production begins with our artisans in Italy, Belgium and Switzerland. Handmade just for you.

You should leave a first appointment knowing more than when you arrived, whether or not you commission anything. You can book an appointment in Zurich or virtually.

If you are still at the looking stage, the engagement ring collection is the place to start, and the engagement ring guidecovers the practical questions in more depth. If nothing on the site is quite it, your own personal design begins the same way, with a conversation. And when the ring is decided, eternity rings and wedding bands is the next thing most people come back for.

FAQ

How far in advance should I order an engagement ring? Plan on three to four months before the date you have in mind. Production alone takes 2 to 10 weeks depending on the design, and the conversation, stone sourcing and design approval happen before that clock starts. If you have a fixed deadline, mention it in the first conversation and it can be planned around.

Is IGI or GIA better for a lab-grown diamond? They now do different things. IGI continues to grade lab-grown diamonds on the full 4Cs, so you get specific color, clarity and cut grades you can compare between stones. Since October 2025, GIA places lab-grown diamonds into two broad categories, premium or standard, instead of assigning individual grades. For comparing loose stones in detail, an IGI report is the more useful document. GIA stones can still be sourced on request.

How do I find out her ring size without asking? Borrow a ring she already wears on the correct finger and have it measured, ask a sister or close friend, or work from the ring size guide. Measure at the end of the day at normal room temperature, since fingers change size with heat, cold and time of day. Some designs, such as full eternity bands, are much harder to resize once finished.

What actually makes one diamond better than another? Cut, more than anything else. It determines brightness, fire and scintillation, which is everything you see when the stone moves. Two diamonds with identical color and clarity grades can look completely different in daylight. This is why every IRALIS stone is assessed in real light by our gemologist and never accepted on its certificate alone.

Should I choose the ring alone or together? Both work. A surprise proposal is possible with good preparation on size and style, and the details she has already given you without realizing. Choosing together removes all risk and turns the design itself into part of the story.

Which metal should I choose for an engagement ring? Match what she already wears first. Beyond that, platinum is denser and stronger than gold and holds diamonds securely, which suits daily wear and delicate settings. White gold is finished with rhodium plating, which wears over time and needs occasional renewing. Colorless and near colorless diamonds show best in a white metal, so if she prefers yellow or rose gold, white prongs on a warmer band are a good compromise. IRALIS works in 14k and 18k recycled gold, with platinum available for bridal.