Cut
How well the diamond is proportioned and faceted — the largest influence on sparkle.
Buying guide
Engagement Ring Buying Guide
Everything you need to know about choosing a diamond, style, setting and metal — from finding your budget to creating a ring that feels completely yours.
The buying journey
Choosing a ring, one decision at a time
An engagement ring is a set of personal choices rather than a single purchase. Budget, diamond, shape, setting, metal, lifestyle, size, origin and whether you want something ready-made or designed for you — each one shapes the ring that will be worn every day.
This guide walks through those decisions in a calm order. You can read it through, or move from a section into the collections that match it. If you would rather talk it through, a gemmologist at our Hatton Garden workshop can help you compare options without any hurry.
- Budget — what you want the ring to feel like, and where to spend
- Diamond — quality, origin and how it will be seen on the hand
- Shape — silhouette, sparkle and the settings that suit it
- Setting and style — solitaire, halo, three stone and beyond
- Metal — platinum or gold, and how each wears over time
- Lifestyle — daily wear, work, and a future wedding band
- Ring size — measured properly, before the ring is finished
- Natural or lab grown — two options, explained without pressure
- Bespoke — if nothing ready-made feels quite right
Where to begin
How to choose an engagement ring
Start with how the ring will be worn, then work towards the diamond and setting that suit that life. A ring chosen for daily wear, work and a future wedding band will feel different from one chosen only for the proposal photograph.
There is no required order after that. Some people fall in love with a shape first. Others begin with a metal they already wear. Our role is to help you compare those choices clearly — online, or in person in Hatton Garden — so the ring you take home feels considered rather than rushed.
Budget
Decide what the ring should feel like, then spend with intention
A useful budget is one that leaves room for the diamond, the setting and the metal — not only the stone. There is no single formula that suits every couple, and we will not invent one for you.
Begin with the kind of ring you want to wear: quiet and classic, or more distinctive. From there, a gemmologist can show you where each choice affects the overall cost, so you spend on the details you will actually notice.
- The diamond — cut, carat and the qualities you will notice most
- The setting — how the diamond is held, and how detailed the making is
- The metal — platinum or gold, and how it will be worn every day
- Certification and craft — independent grading, and the workshop that finishes the ring
Diamond shape
Choose your diamond shape
Shape changes how a diamond sits on the hand, how it catches the light, and the kind of setting that suits it best. Explore the cuts we make most often, then open the matching collection.
Round
The classic brilliant cut — even light return and a familiar silhouette.
Shop round engagement ringsOval
Elongated brilliance that can make the diamond appear larger on the hand.
Shop oval engagement ringsEmerald
Step-cut facets and a calm, architectural glow.
Shop emerald engagement ringsPear
A teardrop outline that sits beautifully in solitaire and halo settings.
Shop pear engagement ringsMarquise
A slender, pointed silhouette that lengthens the finger.
Shop marquise engagement ringsCushion
Soft corners and a romantic, vintage-leaning character.
Shop cushion engagement ringsPrincess
A square brilliant with crisp geometry and lively sparkle.
Shop princess engagement ringsRadiant
A rectangular outline with brilliant-cut facets for extra fire.
Shop radiant engagement rings
Diamond education
The 4Cs, in brief
Cut, colour, clarity and carat work together. These notes are a starting point — the dedicated education guide goes further when you are ready.
Colour
Graded from colourless to faint tints. The right grade depends on the metal and setting around it.
Clarity
Internal or surface characteristics. Many are invisible once the diamond is set and worn.
Carat
The diamond's weight. Cut quality and spread affect how large it appears on the hand.
Ring style
Find a setting that suits the diamond
The setting is how the diamond is held, protected and seen. Choose a style first, then open the collection that matches it.
Solitaire
A single diamond held in a clean setting — timeless, versatile and easy to wear every day.
Shop solitaire engagement rings
Halo
A frame of smaller diamonds around the centre stone, adding presence without needing a larger carat.
Shop halo engagement rings
Three stone
A centre diamond with a companion stone on each side — often chosen for its balance and symbolism.
Shop three stone engagement rings
Diamond band
A band set with a continuous line of diamonds, either as the setting itself or as a pavé shoulder.
Shop diamond band engagement rings
Collection
Explore engagement rings
A starting point from the current collection — settings designed to be finished around the diamond you choose.
Metal
Choose a metal that will be worn every day
Metal is colour, durability and the way the ring sits against the skin. Most Primo settings can be made in all four, and every ring is hallmarked by the London Assay Office.
Platinum
Naturally white, highly durable, and a classic choice for a ring that will be worn every day.
Shop platinum ringsWhite gold
A bright white finish, usually rhodium-plated, with a cool contemporary character.
Shop white gold ringsYellow gold
Warm, traditional colour that pairs beautifully with many diamonds and skin tones.
Shop yellow gold ringsRose gold
A softer blush tone — distinctive without feeling ornate, and quietly contemporary.
Shop rose gold rings
Lifestyle
The ring should work with the life around it
The most beautiful ring is still the one that can be worn. Think about work, travel, sport and how often the ring will come off. A lower profile, a protective setting or a more robust metal can matter as much as the diamond itself.
If a wedding band will follow, say so early. We shape bands to sit with the engagement ring, which is far simpler when both are considered together.
- Daily wear — a profile that will not catch on gloves, keyboards or kit
- Work and an active life — claw height, durability and how the ring is taken on and off
- Wedding band compatibility — leaving room for a band that can sit flush later
Fit
Find the right ring size
A ring that is even half a size out will be noticed every day. Fingers change with temperature, time of day and the seasons, so a proper measurement — in person, or with a well-made sizer — is worth doing before the ring is finished.
If you are planning a surprise, we can help you estimate a size discreetly and adjust later where the design allows. Many Primo rings include complimentary resizing.
Diamond origin
Natural or lab grown?
Both are diamonds. They can share the same optical properties, the same 4Cs language, and the same independent certificates. They differ in origin, in how they are grown or formed, and often in price for a given size and quality.
The right choice is the one that matches your values and your budget — not a rule. Our gemmologists compare both, side by side, when that is useful. The dedicated guide covers the differences in more depth.
Made for you
Create something completely yours
If nothing ready-made feels quite right, we can design a ring with you — from a first sketch through diamond selection to a piece finished in our Hatton Garden workshop.
Bespoke does not have to mean complicated. It can be a familiar silhouette, adjusted for a hand, a heirloom stone, or a detail that would not exist on a standard setting. A consultation is the calmest place to begin.
From the workshop
Choose the diamond for how it will be worn, not only how it looks in a tray.
Francesco NicolaouFounder, Primo Diamonds
Before you choose
A short buying checklist
A pause before you buy or book — not a test, just the decisions that tend to matter most.
- Budget
- Diamond shape
- Diamond quality
- Ring style
- Metal
- Ring size
- Lifestyle
- Natural or lab grown
- Bespoke options
Private consultation
You don't have to choose alone
A gemmologist can help you compare diamonds, settings and metals — in Hatton Garden or by video — without any pressure to decide on the day.
Continue reading
Related guides
Questions
Frequently asked questions
A few starting points. If you would rather talk it through, book a consultation with a gemmologist.
How do I start choosing an engagement ring?
Begin with how the ring will be worn, then compare diamond shape, setting and metal. You do not need to decide everything at once. A consultation is useful if you would like those options laid out side by side.
How much should I spend?
There is no required formula. A useful budget is one that covers the diamond, the setting and the metal you actually want to wear. We can show you where each choice affects cost, without prescribing a number.
Which diamond shape should I choose?
The right shape is the one that suits the hand and the setting. Round remains the most familiar brilliant cut; oval, emerald, pear and cushion each change the silhouette. Try a few in person if you can — photographs flatten the differences.
Should I choose a natural or lab-grown diamond?
Both are diamonds, independently certified. They differ in origin and often in price for a given size and quality. We compare both when that is helpful; the dedicated guide explains the differences in more depth.
Do I need to know the ring size before I buy?
It helps, but it is not essential. Many clients start with style and diamond, then confirm size before the ring is finished. We can also resize afterwards where the design allows.
Can I design a bespoke ring with Primo?
Yes. Bespoke can be a familiar silhouette adjusted for a hand, an heirloom stone, or an entirely new design. A consultation is the simplest place to begin — in Hatton Garden or by video.
Can I book a consultation if I am not sure what I want yet?
That is often the best time to come. Bring any photographs, a sense of budget if you have one, and the rest can be explored together. There is no obligation to buy on the day.