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18ct Yellow Gold Cushion Cut Trilogy (3 Stone) Engagement Rings

18ct yellow gold cushion cut trilogy (3 stone) engagement rings, handmade to order by our family workshop in the Cotswolds and set with a diamond you choose yourself. The cushion cut has softly rounded corners and large facets, with a romantic, vintage glow. A trilogy ring sets three diamonds side by side, often said to stand for your past, present and future.

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The cushion cut diamond

The cushion cut is a square or slightly long diamond with softly rounded corners, like a pillow. Its larger facets give big, bold flashes of light, with a warm, vintage feel that goes back over two hundred years. The side stones are matched to the cushion centre diamond so the three sit in proportion.

Why a trilogy ring?

A trilogy, or 3 stone, ring sets a centre diamond between two smaller side stones. It gives a wider, fuller look across the finger than a solitaire, and the three stones are often said to stand for your past, present and future together.

Why 18ct yellow gold?

18ct yellow gold is 75% pure gold, with the deep, warm colour people picture when they think of a gold ring. It is not plated, so the colour never fades. Some of our yellow gold designs hold the diamond in a white platinum head, so the stone looks as white as possible while the band stays golden. Yellow gold also flatters a slightly warmer diamond, so a stone in the H to J colour range can look just as good as a pricier, whiter one. For a lower price, see our 9ct yellow gold engagement rings.

Choosing your cushion diamond

Our diamond search splits cushions by shape: square cushions have a ratio up to 1.08, and elongated cushions start at 1.15. Cushions can hold a little colour in their corners, so G to H is a good colour choice, with SI1 or better clarity.

Choose your own diamond

Every ring is set with a centre diamond you choose yourself, natural or lab-grown, from our live stock. Each stone has its grading report, and the ring page shows the finished price before you buy.

Made to order in the Cotswolds

Every ring is made to order in our family workshop in Bourton-on-the-Water, where we have made fine jewellery since 1969. We use 100% recycled precious metal, every ring is independently hallmarked, and each one takes 3 to 4 weeks. Delivery is free across the UK, and returns are free within 30 days.

Frequently Asked Questions

It is down to taste. A square cushion (ratio up to 1.08) gives a classic, soft look; an elongated cushion (1.15 and above) looks larger face up and lengthens the finger. You can search for either.

Yes. The side stones are chosen to suit the size and colour of your centre diamond, so the three look balanced together.

Yellow gold reflects a little warmth into the diamond, so a near-colourless stone in the H to J range looks just as good as a whiter, more expensive one. If you want an icy white stone, choose a design with a platinum head.

3 to 4 weeks from order, as every ring is made to order in our workshop. If you have a date in mind, contact us and we will do our best to help.