Cushion-cut lab-grown diamond trilogy ring with trillion sides in white gold by THE LAB Jewellers
Alexandra — Cushion and Trillion Trilogy Lab-Grown Diamond Ring — worn on the hand
Alexandra — Cushion and Trillion Trilogy Lab-Grown Diamond Ring — worn, angled detail
Cushion-cut lab-grown diamond trilogy ring with trillion sides in yellow gold by THE LAB Jewellers
Cushion-cut lab-grown diamond trilogy ring with trillion sides in rose gold by THE LAB Jewellers
Cushion and Trillion Trilogy Lab-Grown Diamond Ring, white gold view 1
Cushion and Trillion Trilogy Lab-Grown Diamond Ring, white gold view 2
Cushion and Trillion Trilogy Lab-Grown Diamond Ring, white gold view 3
Cushion and Trillion Trilogy Lab-Grown Diamond Ring, white gold view 4
Cushion and Trillion Trilogy Lab-Grown Diamond Ring, yellow gold view 1
Cushion and Trillion Trilogy Lab-Grown Diamond Ring, yellow gold view 2
Cushion and Trillion Trilogy Lab-Grown Diamond Ring, yellow gold view 3
Cushion and Trillion Trilogy Lab-Grown Diamond Ring, yellow gold view 4
Cushion and Trillion Trilogy Lab-Grown Diamond Ring, rose gold view 1
Cushion and Trillion Trilogy Lab-Grown Diamond Ring, rose gold view 2
Cushion and Trillion Trilogy Lab-Grown Diamond Ring, rose gold view 3
Cushion and Trillion Trilogy Lab-Grown Diamond Ring, rose gold view 4
Cushion and Trillion Trilogy Lab-Grown Diamond Ring — 360° spin video

Alexandra — Cushion and Trillion Trilogy Lab-Grown Diamond Ring

Approx. 2.09ct total · Cushion centre with trillion sides

D–F colour · VS1+ clarity · IGI report included

Made to order — dispatched in around four weeks, hallmarked where required

Regular price£1,850.00
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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.

✓  12-month guarantee

✓  Secure checkout

✓  14-day returns on standard pieces, and faulty pieces always covered · Returns & Refunds

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✓  Made to your size · find your ring size

✓  Questions? info@thelabjewellers.com or tap WhatsApp

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.

Alexandra finds its beauty in contrast. A softly squared centre is met by two crisp triangular sides, bringing curve and angle together in one composed trilogy. The three stones sit close, so the meaning and the geometry arrive as a single idea.

The 7.00 × 7.00mm cushion cut centre lab-grown diamond weighs 1.78ct. A 3.75 × 3.75mm trillion lab-grown diamond sits on either side, each meeting the shoulders flush. Beneath them, the plain polished shank removes every distraction. With no further stones along the band, the eye stays on the changing outlines of the cushion and trillions.

Alexandra balances curve and angle

Alexandra gives the trilogy a distinct character through three shapes working as one 2.09ct composition. The cushion centre brings softness, while the two trillion lab-grown diamonds add definition at the shoulders and draw the design into the plain band. Choose 14kt for the harder, more scratch-resistant gold, or 18kt for more pure gold and a heavier feel. An independent IGI grading report for the centre stone is included.

  • Stone type: Lab-grown diamond
  • Stone shape: Cushion centre with trillion sides
  • Stones: 1 × 7.00mm cushion centre (1.78ct) and 2 × 3.75mm trillion sides (0.155ct each)
  • Stone count: 3 lab-grown diamonds
  • Total lab-grown diamond weight: Approx. 2.09ct
  • Certificate: includes an independent IGI grading report for the centre stone, at no extra cost.
  • Metal options: 14kt or 18kt White, Yellow or Rose Gold

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 ring size. Our usual timeline is around four weeks from order to dispatch, which includes UK hallmarking where required. More complex pieces may take slightly longer. We confirm the expected timeframe in writing before production begins.

Wearing Alexandra

The close set trilogy and polished shank make Alexandra a meaningful engagement or anniversary ring. It wears neatly beside a plain band, which allows the cushion centre and triangular side stones to remain clearly defined. Worn alone, the trilogy supplies all the detail required.

Questions about Alexandra

How do Alexandra's three lab-grown diamonds differ in shape?
The centre is a 7.00 × 7.00mm cushion cut lab-grown diamond weighing 1.78ct. It is framed by two 3.75 × 3.75mm trillion lab-grown diamonds, each positioned against the shoulders.

Does Alexandra come with an IGI grading report?
Yes. The cushion centre lab-grown diamond includes an independent IGI grading report at no extra cost. All three lab-grown diamonds are D to F colour and VS1 clarity or better.

How long is Alexandra made to order?
Alexandra is made to order in around four weeks and in your chosen UK ring size at no extra charge. It comes with free tracked and signed-for UK delivery and a 12-month guarantee.

Jewellery Care

Store separately in the pouch or box provided. Avoid contact with harsh chemicals, perfume, and chlorine. Clean gently with a soft cloth or mild soap solution. Remove before swimming, exercising, or sleeping. See our Materials & Care guide for full instructions.

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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