Traditional Princess cut Diamond Halo Engagement Ring

Agatha is our traditional Princess cut Diamond Halo Engagement Ring; providing a feel of elegance in every detail. The central Princess cut Diamond is held within a secure four claw setting, and is encircled by a halo of an additional 0.15cts of Round Brilliant cut Diamonds. The plain and slender shoulders enhance the luxury of the central Diamond and it's halo. This design also boasts a Wedding Ring friendly setting, opening it up to a wide range of Wedding Ring styles when the time comes. This ring is also fully customisable, from the precious metal it is created in, to the full specifications of the Diamond, including its carat weight, colour and clarity (both available from the drop-down menu above). Once we have created your ring to your exact specifications, it will then be delivered straight to your door in our discreet packaging with the addition of a small proposal ring box, perfect for a surprise proposal. 

Diamond grading you can trust

Trust in reputable diamond certification from GIA (Gemological Institute of America) and IGI (International Gemmological Institute). Our diamonds achieve a minimum of a VERY GOOD CUT. This ensures maximum brilliance from your diamond. Excellent cut diamonds can be provided upon request.

Free UK Finger Size Tool ?

We will send you a free UK finger size tool. This very handy strap style sizer will make it much easier to work out your finger size. We will put this in the post same day with immediate confirmation this has been sent. This useful ring sizer is without any obligation to make a purchase. 

Order your free UK ring sizer

Do you need guidance?

Get in touch for friendly, helpful guidance on regular engagement rings and on our bespoke design service. We offer free, impartial advice on all aspects of your purchase from diamond grading and precious metals to finance. 

Contact us today

How does my engagement ring arrive?

Within the United Kingdom, each completed ring from our extensive diamond engagement ring collection beautifully packaged and sent by International Signed For Delivery, by Royal Mail. We insure all parcels until they arrive with you. Deliveries arrive next day after despatch. All parcels arrive under plain wrapping. Inside you will discover a sturdy outer box, containing a document section with document folder for valuations and certification. Your engagement ring will arrive inside a presentation box, accompanied by our handy pocket sized ring box. 

Read more about packaging and delivery 

Interactive diamond sizes - see how your diamond sizes appears on the hand

Select your chosen diamond shape and carat weight and see how big it looks on the finger. Our handy tool is designed to help you judge diamond size across a variety of diamond shapes. 

Photographed example of our engagement ring packaging for clients across the UK. Engagement rings are sent in luxurious packaging with presentation box and pocket box conveniently sized to hold the engagement ring for a surprise proposal. 

Buy with Confidence UK 

For your total reassurance, Serendipity Diamonds is listed with Buy with Confidence, and offers 100% reassurance and satisfaction. UK Buyers benefit from 60 days returns on most items, a lifetime warranty free size adjustments and competitive prices (50 - 70% below high street prices) on most items. Our diamonds are sourced directly from diamond polishers worldwide and rings are meticulously crafted in our workshops before being sold directly. The result is exceptional value for money with all of the benefits of luxury—the complete package. Read more about us online. Besides our diamonds, enjoy the reassurance of natural, beautifully cut and responsibly sourced pink sapphires, blue sapphires, rubies and emeralds for our gemstone collection of engagement rings.