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Engagement Ring & Diamond Guide

Choosing the right engagement ring

Deciding whether to choose a ring yourself, or to choose it with your partner, is a personal choice that will be influenced by how confident you are in choosing the perfect ring.

Ideally you will already have an idea about their personal tastes and preferences. If you’re unsure, take a look at your partner's jewellery box to discover what style they like and take note of the metals (9ct or 18ct), gold colours (rose, yellow or white), designs (plain and simple, lots of filigrees and detailing, modern and contemporary, bold or understated) and gemstones (purple amethysts, pearls, rubies, etc). This should give you a good idea of what style and type of ring they prefer.

Don’t forget: Clogau offers a 14-day money-back returns policy so that you can return the ring if they don’t like it.

You may decide that you would prefer to shop for a ring after the proposal, together, so that your partner can be involved in the experience and there’s no danger of choosing the wrong ring.

For something extra special, you could propose with a Cariad locket or Fairy locket with the message "Will you marry me?" written on a note inside.

How much should you spend?

As a guide, it’s generally recommended that you spend between 1-3 months salary on an engagement ring. Our advice is to spend what you feel is right, with regards to getting the desired quality. Don’t forget though, this will be a once-in-a-lifetime ring.

What ring size?

There are a few ways that you can find out your partner's ring size without having to ask. The easiest way would be to borrow a ring of theirs while they are away and compare it with our online ring size guide, or take it to a jeweller for them to measure. You could also ask a close friend or relative to find out for you, as long as you can trust them with your secret.

Diamond Guide

To be able to choose the most perfect engagement ring, you need to know a little about diamonds. There are four key areas to focus on so that you can then decide which are most important to you and how they each affect the price of a diamond.


You should first decide on the diamond shape. There any many options, with the two most popular shapes being princess (square) and round. Undoubtedly the most important factor to consider is the cut as this determines the diamond’s ‘sparkle’ and has the most impact on its overall beauty. Our diamonds are available in the classic round brilliant cut, perfected to generate maximum radiance and the princess cut, a contemporary square cut that has become very popular this millennium.


A diamond’s colour is measured by how colourless it is. Diamonds are graded from D (colourless and extremely rare) to Z (noticeably coloured). Compose by Clogau® diamonds are near colourless and of superb quality. We have carefully selected three options for you to choose from – D, G and I (D being the best).


The weight of a diamond is measured in carats and points; 100 points = 1 carat. The carat refers to the diamond weight and is a rough reflection of the overall size of the diamond (but not the quality of the diamond). The ideal carat weight for an engagement ring will depend on the size of the wearer's finger and your budget.


Almost every diamond that exists contains naturally occurring imperfections, most of these are very tiny and cannot be seen with the naked eye – only with x10 magnification. They have no visible impact on a diamond’s overall appearance. Diamonds are graded from FL (flawless) to I3 (not recommended). When you start composing your ring you can choose from SI1 (slightly included), VS2 (very slightly included) and VS1 (very slightly included, our best) diamonds.

Good luck! If you need any further advice, please don’t hesitate to contact our sales office on 0345 606 88 77 who will be more than happy to advise you further.