Choosing an engagement ring comes down to five main decisions: your budget, the stone, the setting, the metal and the personal style of the person who will wear it.
You do not need to understand every diamond grade or know exactly what ring you want before you start looking. A good engagement ring should suit the wearer, work with their lifestyle and feel comfortable within your budget.
This guide explains how to choose an engagement ring in the UK, including how much to spend, natural vs lab-grown diamonds, diamond shapes, the 4Cs, metals, ring size, settings and bespoke engagement rings.
Last updated: October 2026
Quick answer: how do you choose an engagement ring?
Start with these five things:
- Decide on a comfortable budget.
- Look at the jewellery your partner already wears.
- Choose between a diamond or another gemstone.
- Decide on the stone shape and setting.
- Choose the metal and find the correct ring size.
If you are unsure about any of these, you do not need to decide everything yourself. A jeweller can work from a photograph, an idea or even just your budget.
How much should you spend on an engagement ring?
There is no correct amount to spend on an engagement ring. The best budget is one you can comfortably afford without putting yourself under financial pressure.
The traditional idea that you should spend two or three months' salary is not a rule.
In the UK, engagement ring budgets vary enormously. Instead of starting with a target carat weight, decide what you are comfortable spending and then work out how to get the best ring within that amount.
For example, you may choose:
- a smaller natural diamond with excellent proportions
- a larger lab-grown diamond
- 9ct gold instead of 18ct gold
- a simple solitaire rather than a diamond-set band
A good jeweller should be able to explain where spending more will genuinely make a visible difference.
What are the most important things to consider when buying an engagement ring?
The most important factors are:
Personal style: Does your partner normally wear minimal, classic, vintage-inspired or statement jewellery?
Lifestyle: Someone who works with their hands may need a lower or more protective setting.
Stone: Decide whether you prefer a diamond or coloured gemstone.
Metal: Consider yellow gold, white gold, rose gold or platinum.
Budget: Work within a number that feels comfortable.
The ring should be chosen for the person wearing it, rather than simply following current trends.
Should I buy a natural or lab-grown diamond?
Both natural and lab-grown diamonds are real diamonds. The main difference is how they are formed and their price.
Natural diamonds form in the Earth over an extremely long period of time.
Lab-grown diamonds are created in controlled laboratory conditions using technology that reproduces the conditions in which diamonds form.
Natural diamond
A natural diamond may be the right choice if you value natural origin, rarity and tradition.
Lab-grown diamond
A lab-grown diamond may suit you if you want a larger or higher-specification stone for the same budget.
Which is better?
Neither is automatically better.
The best choice depends on what matters most to you: origin, rarity, size, specification or budget.
THERESHEIS.jewels can source both natural and lab-grown diamonds for bespoke engagement rings.
Is a lab-grown diamond a real diamond?
Yes. A lab-grown diamond is a real diamond with essentially the same chemical and physical properties as a natural diamond.
It is not the same thing as cubic zirconia or a simulated diamond.
The key difference is origin: one grows naturally underground and the other is produced in a laboratory.
What are the 4Cs of a diamond?
The 4Cs are:
Cut, Colour, Clarity and Carat.
They are commonly used to describe and compare diamonds.
What is diamond cut?
Cut describes how well a diamond's facets interact with light.
For many buyers, cut is one of the most important characteristics because it has a significant effect on sparkle.
A beautifully cut diamond can look more impressive than a larger diamond with weaker proportions.
What is diamond colour?
Diamond colour refers to how colourless a diamond appears.
You do not always need the highest possible colour grade.
The metal surrounding the stone can also influence how white or warm it appears.
What is diamond clarity?
Clarity describes natural features within a diamond, known as inclusions.
Many inclusions cannot be seen with the naked eye.
This means an eye-clean diamond can offer excellent value without requiring the highest clarity grade.
What does diamond carat mean?
Carat measures a diamond's weight.
It does not directly tell you how large the diamond will look from above.
Two diamonds of the same carat weight may have different dimensions depending on their shape and proportions.
Which diamond shape should I choose?
There is no single best diamond shape. Choose the shape that best matches your partner's style and the look you want to achieve.
Round brilliant
Classic, highly versatile and known for strong sparkle.
Best for someone who likes timeless jewellery.
Oval
Elegant and elongated.
Oval diamonds can often appear larger from above than round diamonds of a similar carat weight.
Emerald cut
Clean, architectural and understated.
Emerald-cut diamonds have long facets and a different type of sparkle from brilliant cuts.
Pear
A combination of a rounded and pointed shape.
Pear diamonds feel distinctive while remaining elegant.
Marquise
Long and pointed at both ends.
The elongated outline can create significant visual presence.
Cushion
Soft corners and a romantic appearance.
Cushion cuts work well in both classic and vintage-inspired settings.
Radiant
A rectangular or square outline combined with brilliant-style faceting.
A good option if you like clean lines but still want strong sparkle.
Princess
Square and contemporary.
Princess-cut diamonds can work particularly well in modern settings.
Which diamond shape looks the biggest?
Oval, marquise and pear-shaped diamonds often look larger for their carat weight because they have an elongated surface area.
However, carat weight alone should not determine your choice.
Always look at the actual millimetre dimensions of the stone as well as its weight.
What is the best engagement ring setting?
The best setting depends on the style of the ring, the stone and how the wearer lives.
Solitaire
A solitaire has one centre stone.
It is simple, timeless and puts the focus on the diamond or gemstone.
Halo
A halo surrounds the centre stone with smaller diamonds.
It adds sparkle and can make the centre stone appear larger.
Three-stone
A centre stone is accompanied by a smaller stone on each side.
This creates greater finger coverage and a more detailed look.
Bezel
A rim of metal surrounds some or all of the stone.
A bezel can offer additional protection and has a clean, modern appearance.
Pavé
Small diamonds are set into the band.
This adds sparkle around the centre stone.
Which engagement ring setting is safest?
A bezel setting is generally one of the most protective choices because metal surrounds the edge of the stone.
Secure claw settings can also be suitable for everyday wear when properly designed and maintained.
The safest setting will also depend on the shape of the stone. Pointed shapes such as pear and marquise diamonds usually need protection around their tips.
Is 9ct or 18ct gold better for an engagement ring?
Both 9ct and 18ct gold can be suitable for engagement rings. The better choice depends on your budget, colour preference and priorities.
9ct gold contains 37.5% pure gold.
18ct gold contains 75% pure gold.
9ct gold
9ct gold is harder and generally more affordable.
It can be an excellent option for someone who wants a solid gold engagement ring at a lower price point.
18ct gold
18ct gold contains more pure gold and has a richer gold content.
It is frequently chosen for fine jewellery and higher-value engagement rings.
Quick comparison
| Feature | 9ct Gold | 18ct Gold |
|---|---|---|
| Pure gold content | 37.5% | 75% |
| UK fineness mark | 375 | 750 |
| Price | Lower | Higher |
| Hardness | Generally harder | Slightly softer |
| Gold colour | Lighter | Richer |
| Suitable for engagement rings | Yes | Yes |
Yellow gold, white gold or platinum: which should you choose?
Look first at the jewellery your partner already wears.
Yellow gold
Warm, classic and flattering with both diamonds and coloured gemstones.
White gold
Cooler in appearance and popular for contemporary diamond rings.
Platinum
Naturally white, dense and commonly used in fine jewellery.
If your partner almost always wears yellow gold, that is usually a stronger clue than whichever metal is currently trending.
How do I find my partner's ring size without asking?
The easiest way is to borrow a ring they already wear on the correct finger and have it measured by a jeweller.
Other options include:
- asking a close friend or family member
- comparing one of their existing rings against a ring-size guide
- asking a jeweller whether the chosen design can be resized later
Remember that fingers can differ in size between hands.
A ring worn on the right hand may therefore only provide an approximate size for the left ring finger.
What if I do not know what engagement ring my partner likes?
Start with what they already wear.
Look for clues such as:
- yellow or white metal
- delicate or bold jewellery
- simple or detailed designs
- modern or vintage-inspired pieces
- stone shapes they have previously mentioned
- rings saved on Instagram or Pinterest
You do not need to know jewellery terminology.
An inspiration image can be enough to start a conversation with a jeweller.
Should an engagement ring be a surprise?
The proposal can be a surprise even if the ring is not completely unexpected.
Many couples discuss preferences before the proposal.
Your partner might tell you they love oval diamonds and yellow gold but leave the final design to you.
Other couples choose the ring together.
There is no correct approach.
Knowing at least their preferred metal, general style and opinion on natural versus lab-grown diamonds can reduce the risk of choosing something they would not wear.
Is a bigger diamond always better?
No. A bigger carat weight does not automatically mean a better-looking engagement ring.
Cut, proportions, shape and setting all affect the final appearance.
A smaller diamond with excellent proportions may look brighter and more balanced than a heavier stone with a poor cut.
Instead of asking only:
“What is the biggest diamond I can afford?”
consider asking:
“What will look best within my budget?”
How can I make an engagement ring look bigger?
There are several ways to create more visual presence without dramatically increasing carat weight.
You can consider:
- oval, marquise or pear-shaped diamonds
- elongated radiant cuts
- halo settings
- a slightly narrower band
- carefully chosen stone proportions
The aim should still be a balanced and durable ring rather than simply making the centre stone appear as large as possible.
What does a diamond certificate tell you?
A diamond grading certificate provides independent information about the characteristics of a particular diamond.
Depending on the report, it can include:
- carat weight
- colour
- clarity
- dimensions
- proportions
- identifying characteristics
Certification can be particularly useful when purchasing a higher-value centre diamond.
Not every small diamond used in a ring will have its own certificate.
If certification is important to you, ask before purchasing.
Can you use a gemstone instead of a diamond for an engagement ring?
Yes.
Sapphires, rubies and other gemstones can all be used in engagement rings.
However, an engagement ring is usually worn every day, so durability matters.
Some gemstones are more suitable for regular wear than others.
Ask your jeweller how durable the stone is and whether the chosen setting provides enough protection.
Should I buy a ready-made or bespoke engagement ring?
Choose a ready-made engagement ring if you already love an existing design. Choose bespoke if you want more control over the stone, proportions, setting, metal or overall design.
Bespoke does not mean you need to invent a completely original ring.
You can start with:
- a photograph
- a ring you have seen online
- a particular stone shape
- a rough idea
- a budget
The design can then be adjusted around your preferences.
How does a bespoke engagement ring work?
At THERESHEIS.jewels, the bespoke engagement ring process is designed to be straightforward.
Step 1: Share your idea
Send us inspiration images or tell us what you are looking for.
You can also start with nothing more than a preferred stone shape or budget.
Step 2: Complimentary consultation
We can arrange a free phone or WhatsApp consultation to discuss your ideas, stone preferences, metal and budget.
There is no obligation to proceed.
Step 3: Receive your quotation
We prepare a personalised quotation before the design stage.
The quotation is free and there is no obligation to continue.
Step 4: CAD design
Once you are happy with the quotation, a detailed CAD design is prepared.
This allows you to review the proportions and measurements of your ring before it is made.
Step 5: Confirm the stone and design
Your chosen diamond or gemstone and final CAD are approved before production.
Step 6: Your ring is made
The ring is made to order, finished and hallmarked in accordance with UK requirements.
Step 7: Delivery
Your finished ring is prepared for delivery.
Most bespoke engagement rings take approximately four to five weeks from final CAD approval.
How far in advance should I order an engagement ring?
For a bespoke engagement ring, allow at least four to five weeks after final CAD approval, plus time for the consultation, quotation and design stage.
If you already have a proposal date in mind, begin the process as early as possible.
Extra time allows you to consider different stones and designs without feeling rushed.
What should I ask a jeweller before buying an engagement ring?
Before ordering, ask:
- What metal is the ring made from?
- Is the centre diamond natural or lab-grown?
- Is the diamond certified?
- What is the estimated production time?
- Is the ring hallmarked?
- Can the ring be resized?
- What happens if the size is wrong?
- What is the returns policy?
- Are bespoke orders returnable?
- What aftercare is available?
Clear answers to these questions will help you understand exactly what you are buying.
Engagement ring checklist
Before placing your order, make sure you know:
Budget: How much are you comfortable spending?
Style: What type of jewellery does your partner normally wear?
Stone: Diamond or gemstone?
Diamond origin: Natural or lab-grown?
Shape: Round, oval, emerald, pear, cushion or another cut?
Setting: Solitaire, halo, three-stone, bezel or pavé?
Metal: 9ct gold, 18ct gold or platinum?
Colour: Yellow, white or rose?
Ring size: Do you know it, or can the ring be resized?
Timing: When do you need the finished ring?
Quick comparison: natural vs lab-grown diamonds
| Natural Diamond | Lab-Grown Diamond |
|---|---|
| Formed naturally underground | Created in a laboratory |
| Real diamond | Real diamond |
| Usually more expensive for comparable specifications | Usually less expensive for comparable specifications |
| Chosen for natural origin and rarity | Often chosen for size and value |
| Certification can be available | Certification can be available |
Quick comparison: ready-made vs bespoke engagement rings
| Ready-made | Bespoke |
|---|---|
| Existing design | Created around your preferences |
| Faster if in stock | Requires design and production time |
| Limited customisation | Greater control over stone, metal and proportions |
| Easy if you already love the design | Ideal when you want something more personal |
Frequently Asked Questions About Engagement Rings
How much should an engagement ring cost in the UK?
There is no fixed amount. Choose a budget you can comfortably afford and ask the jeweller to recommend the best options within it.
Is 1 carat enough for an engagement ring?
Yes. There is no minimum carat weight for an engagement ring. The ideal size depends on the design, finger size, stone shape, budget and personal preference.
Is a lab-grown diamond a real diamond?
Yes. Lab-grown diamonds are real diamonds. Their main difference from natural diamonds is how they are formed.
Is 9ct gold good for an engagement ring?
Yes. 9ct gold is solid gold and can be a durable, practical choice for an engagement ring. More in Is 9ct gold good?
Is 18ct gold better than 9ct gold?
Not necessarily. 18ct contains more pure gold, while 9ct is generally harder and more affordable. Both can be suitable for engagement rings.
What diamond shape looks biggest?
Oval, marquise and pear-shaped diamonds often appear larger for their carat weight because of their elongated proportions.
What is the most timeless engagement ring?
A round brilliant solitaire is one of the most classic engagement ring designs, although oval solitaires, emerald cuts and three-stone rings can also remain timeless.
Can I design an engagement ring from a photo?
Yes. Inspiration photographs are commonly used as a starting point for bespoke engagement rings. The design can then be adapted to your preferred stone, metal, proportions and budget.
How long does a bespoke engagement ring take?
At THERESHEIS.jewels, most bespoke engagement rings take approximately four to five weeks from final CAD approval.
Do I need to know exactly what I want before contacting a jeweller?
No. You can start with a photograph, a budget, a preferred diamond shape or simply an idea.
What is the most important thing when buying an engagement ring?
Choose the ring for the person who will wear it.
The most expensive stone, highest carat weight or most fashionable setting is not automatically the best choice.
Look at their personal style, everyday jewellery and lifestyle.
A well-chosen engagement ring should feel like something they would have chosen for themselves.
Start your engagement ring with THERESHEIS.jewels
You do not need to understand diamond grading or arrive with a finished design.
If you have a photograph saved on your phone, know the diamond shape you like or simply have a budget and need guidance, we can help you work through the options.
THERESHEIS.jewels offers complimentary phone and WhatsApp consultations, free no-obligation quotations and complimentary CAD design for bespoke engagement rings.
Explore our engagement rings or contact us to start creating yours.
