Round and trillion cut lab-grown diamond ring by THE LAB Jewellers
Tessa — Sterling Silver Round and Trillion Cut Lab-Grown Diamond Ring (1.02ct Total) — worn close-up detail
Tessa — Sterling Silver Round and Trillion Cut Lab-Grown Diamond Ring (1.02ct Total) — worn on the hand
Tessa — Sterling Silver Round and Trillion Cut Lab-Grown Diamond Ring (1.02ct Total) — worn, angled detail
Round and Trillion Cut Lab-Grown Diamond Ring (1.02ct Total), view 1
Round and Trillion Cut Lab-Grown Diamond Ring (1.02ct Total), view 2
Round and Trillion Cut Lab-Grown Diamond Ring (1.02ct Total), view 3
Round and Trillion Cut Lab-Grown Diamond Ring (1.02ct Total), view 4
Round and Trillion Cut Lab-Grown Diamond Ring (1.02ct Total) — 360° spin video

Tessa — Sterling Silver 1 Carat Round and Trillion Cut Lab-Grown Diamond Trilogy Engagement Ring (1.02ct Total)

Approx. 1.02ct total · Round and trillion

D–F colour · VS1+ clarity

Made to order — dispatched in around four weeks

Regular price£255.00
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Free tracked and signed-for UK delivery. View delivery details.

Metal

Made in your size at no extra cost. Ring size guide

Not sure of your size? Order a strap sizer — it is £5.00, and we email the full £5.00 straight back to you as a gift card, so it comes off the price of your ring.

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Lab-grown diamond quality

D–F colour  ·  VS1 clarity or better

Every lab-grown diamond is D–F colour and VS1 clarity or better. Round brilliant lab-grown diamonds can receive a formal cut grade; fancy shapes are assessed through their proportions, polish, symmetry and overall make. Any piece whose centre stone, on its own, weighs 1.00ct or more includes an individual IGI grading report as standard. Total carat weight does not count towards this.

Three stones can hold three private meanings, and Tessa leaves those meanings to you. What everyone else sees is a confident spread of lab-grown diamonds across the finger, with a rounded centre and two sharply shaped companions creating a design that feels considered from edge to edge.

The middle is a 5.00mm round lab-grown diamond weighing 0.50ct. On either side sits a 4.50mm trillion-cut lab-grown diamond, the pair contributing 0.52ct and bringing the complete trilogy to 1.02ct. A circle and two triangles sit side by side, and between them the shapes are easy to tell apart. Set in 925 sterling silver, the three stones make a bright, precise arrangement with nothing added for show.

Prefer gold? Tessa is also made in solid 14kt and 18kt gold — see the gold version.

Three reasons to choose Tessa

Tessa gives you more than a carat across three clearly defined stones, so the whole trilogy contributes to its presence. The 0.50ct round centre and two trillion sides total 1.02ct, all in D to F colour and VS1 clarity or better. Only three stones carry the design, and each shape earns its place. Tessa is made in 925 sterling silver in your chosen UK ring size.

  • Stone type: Lab-grown diamond
  • Stone shape: Round and trillion
  • Stones: 1 × 5.00mm round and 2 × 4.50mm trillion
  • Stone count: 3 lab-grown diamonds
  • Total lab-grown diamond weight: approximately 1.02ct
  • Metal options: 925 Sterling Silver

Ring Size

This ring is made to order in your size. Choose your UK ring size when you order — there is no extra charge for any size. If you are unsure of your size, our ring sizer makes it easy at home — and your £5 comes straight back to you as a gift card. Standard UK sizes are available — if you need guidance, contact us before placing your order.

Made to Order

Every piece is crafted to your chosen metal and size. Our usual timeline is around four weeks from order to dispatch. More complex pieces may take slightly longer. We confirm the expected timeframe in writing before production begins.

Wearing Tessa

Tessa works well as the only ring on the hand, with the round centre and both trillion cuts in full view. The cool 925 sterling silver sits quietly behind them, so each lab-grown diamond keeps its own shape. Take it off before swimming, exercise or sleep.

Caring for Sterling Silver

Sterling silver naturally darkens a little over time. It is normal, and a silver polishing cloth brings it straight back. Please don't use silver dip solutions on lab-grown diamond-set pieces, as the chemicals can damage the settings. Store it on its own in the pouch or box provided, and take it off before swimming, exercising or sleeping. See our Materials & Care guide for full instructions.

Questions about Tessa

How is Tessa's 1.02ct total divided between the stones?
The central 5.00mm round lab-grown diamond weighs 0.50ct. Two 4.50mm trillion-cut lab-grown diamonds sit beside it and weigh 0.52ct together, producing the complete 1.02ct total.

What quality are the three lab-grown diamonds in Tessa?
Each of Tessa's three lab-grown diamonds is D to F colour and VS1 clarity or better. The ring combines one round lab-grown diamond with two matching trillion-cut lab-grown diamonds in its trilogy layout.

How do I look after Tessa's silver?
Sterling silver darkens a little with time, which is normal. A silver polishing cloth brings the shine back, but please keep silver dip away from Tessa, as its chemicals can damage the settings.

Need help choosing?

Unsure on size, metal, or lab-grown diamond specification? Email us and we'll guide you to the right option before you order — we reply personally, within two working days.

All pieces are made to order. Sterling silver and gold pieces dispatch in around four weeks, which includes UK hallmarking where required. Every order is tracked and signed for, and UK delivery is free. See how your piece is made, plus our Shipping & Delivery and Returns & Refunds pages for full details.

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