Cecily halo engagement ring with a round lab-grown alexandrite centre stone and diamond accents, front view.
Cecily halo engagement ring with a round lab-grown alexandrite centre stone and diamond accents, side profile showing the setting and band.
Cecily halo engagement ring with a round lab-grown alexandrite centre stone and diamond accents, end-on view showing the setting and band.
Gemstone size comparison chart showing different stone sizes on a hand.
Cecily halo engagement ring with a round lab-grown alexandrite centre stone and diamond accents, front view. Cecily halo engagement ring with a round lab-grown alexandrite centre stone and diamond accents, side profile showing the setting and band. Cecily halo engagement ring with a round lab-grown alexandrite centre stone and diamond accents, end-on view showing the setting and band. Gemstone size comparison chart showing different stone sizes on a hand.

CECILY
Lab Grown Alexandrite & Diamond Platinum 950 Halo Ring

£1,968.00 GBP
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Estimated dispatch 19 Nov – 10 Dec . Need it sooner? Call 0161 537 6773
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Free insured delivery & returns with discreet packaging and 50-day returns.
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Free lifetime warranty, lifetime diamond upgrade and complimentary 1-year resizing.
Finding Your Ring Size
Unsure which size to order? View our Ring Size Guide

One round lab-grown alexandrite sits inside Cecily's diamond-set halo in platinum. The shoulders carry further diamonds towards the centre. The result brings fine stonework into view without confusing the gemstone's individual colour and outline.

The lab-grown alexandrite is the ring's only coloured gemstone. Its brilliant round shape sits among smaller diamonds, which provide the halo and shoulder setting. Diamond-set shoulders guide the eye into the halo, whose smaller stones surround the brilliant round centre. The cut and halo are separate features: one coloured gemstone inside a border of diamonds, rather than a cluster of coloured stones.

Platinum provides a pale metal frame for the round centre and surrounding diamonds. The band is approximately 2.20mm wide, with stone-set shoulders leading into the halo.

Across 12 listed centre sizes, the smallest is 4.0mm and the largest 10.0mm. The weight attached to each option describes one round coloured gemstone. The halo and diamond-set shoulders remain part of the design as the centre's scale changes.

It is a considered balance of one coloured round centre and a more intricate diamond surround.

Specification

  • Centre Stone: Lab grown, Brilliant Round Alexandrite, excellent cut
  • Side Stones & Halo: G/H SI conflict-free diamonds
  • Number of side stones and halo: 26 - 28
  • Metal: Platinum 950
  • Setting: Diamond shoulder set halo
  • Band width approximately 2.20mm
  • This ring is wedding ring friendly, and will fit most standard wedding rings
  • This piece has been certified in accordance with the hallmarking Act 1973

The number of side and halo stones may vary slightly from the main image, this is due to the ring size and centre stone size.

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Shipping

Lily Arkwright is proud to offer free worldwide delivery and returns.

We aim to dispatch most orders within 7–28 days. Selected bespoke designs may take 5–6 weeks.

Estimated delivery times after dispatch:

  • UK: Next working day
  • Europe: 2–5 working days
  • US & Canada: 3–5 working days
  • Rest of the world: Typically 3–5 working days

All parcels are dispatched through our nominated couriers, fully insured and requiring a signature upon delivery.

Returns

Enjoy a 50-day money-back guarantee with complimentary worldwide return postage on eligible purchases, starting from the date of delivery.

To arrange a return or exchange, please email hello@lilyarkwright.com to request a Returns Number (RN) and return instructions. Please retain proof of postage.

Returned jewellery must be unworn, in its original condition and accompanied by its original packaging and relevant certificates.

Certain engraved, personalised or genuinely bespoke pieces may be excluded from change-of-mind returns, without affecting statutory rights.

For orders exceeding £15,000, the change-of-mind returns period is 14 days rather than 50 days, without affecting your statutory rights.

Please see our Delivery & Returns Policy for full details.

A little bit more sparkle perhaps?

You've found your near perfect Lily Arkwright ring, but there's something missing.

Rather than creating a bespoke ring design, simply select any of our popular ring upgrade packages from pointed prongs to a hidden diamond halo, we've got you covered.

View all upgrades here.

Explore related collections

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Matching Wedding Band

We recommend you match the Cecily Engagement Ring with the Ember 2.20mm Wedding Band.

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ABOUT YOUR CENTRE GEMSTONE

Lab-Grown Alexandrite Engagement Rings: Colour and Design

Lab-grown alexandrite brings a distinctive colour-changing character to an engagement ring. This variety of chrysoberyl can appear bluish-green in some lighting and shift towards purple or reddish tones in others. The strength of the effect varies from stone to stone, so photographs taken in a single light may not show its full appearance.

What Is a Lab-Grown Alexandrite Gemstone?

Laboratory-grown alexandrite has the same essential mineral composition as natural alexandrite but is created in controlled conditions. It is not a diamond or a sapphire. Its changing colour is central to its appeal, particularly when paired with bright accent diamonds that provide a consistent contrast as the centre gemstone changes in different light.

Choosing an Alexandrite Engagement Ring Setting

An oval alexandrite gives a graceful, elongated outline; a round or cushion shape creates a different balance on the hand. A solitaire keeps the focus on the gemstone, while a diamond halo frames its changing colour. Compare the centre stone’s millimetre measurements, the metal tone and the side profile of the setting when choosing a ring for everyday wear.

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