Trinity - R3D005
3 Stone Princess Diamond Engagement Ring
Our most popular Princess cut 3 stone diamond engagement ring. The Trinity engagement ring features three Princess cut diamonds. Graduating in size, each Princess cut offers amazing sparkle. Graded G colour and SI1 clarity, enjoy brilliance and high clarity from your Princess Trilogy ring.


Trinity - R3D005
3 Stone Princess Diamond Engagement Ring
Our most popular Princess cut 3 stone diamond engagement ring. The Trinity engagement ring features three Princess cut diamonds. Graduating in size, each Princess cut offers amazing sparkle. Graded G colour and SI1 clarity, enjoy brilliance and high clarity from your Princess Trilogy ring.
Trinity Three Stone Princess Cut Engagement Ring
The Trinity Engagement Ring dazzles with graduating sizes of Princess cut Diamonds. Flowing effortlessly from a slim, court shaped band, three perfectly matched square Princess cut Diamonds rise in harmony within elegant claw settings. Available in a range of carat weight options, each commission gets meticulously crafted around your requirements and budget—offered in a choice of precious metal options. Our standard Diamond Colour and Clarity (G SI1) ensure whiteness and brilliance from expertly matched Diamonds. Contact us for alternative options for other colour and clarity grades. Each commission takes between three and four weeks—completed with a mirror polish and elegantly boxed in luxury packaging.
Responsibly sourced precious metals and Fairtrade Gold
An important part of our work involves the use of responsibly sourced precious metals and gemstones. As such, we only work with re-cycled, ethically sourced Gold, Platinum and Silver. In addition, we offer the option of Fairtrade Gold across most of our jewellery designs available upon request.
How does my engagement ring arrive?
Within the United Kingdom, each completed ring from our extensive diamond engagement ring collection is beautifully packaged and sent by International Signed For Delivery, by Royal Mail. We insure all parcels until they arrive with you.
Deliveries arrive the next day after despatch. All parcels arrive under plain wrapping. Inside you will discover a sturdy outer box containing a document section with a 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.
We believe that presentation is an important part of your experience with us. For this reason, we created incredible packaging as shown in our video below.
How to order your engagement ring
Please feel welcome to order online, or to contact our showroom to order in person. If you place your order online, we will email you an invoice and then advise you on different options for payment. Owing to the high level of card fraud, we handle all payments individually and welcome deposit payments before we start any work.
This ring design is available with a lab-grown diamond.
Learn more about lab-grown diamonds
This ring design is now available with a lab-grown diamond. Please contact us noting your design preference for a detailed quote set with a lab-created diamond. Please note that our lab-grown diamond engagement rings are identical in appearance and quality to our natural diamond options with a difference in cost working out to between 50% - 75% less than our natural diamond equivalent rings. Our lab-grown diamonds are typically available in higher colour clarity and cut grades and include full certification as shown below.
Example of a lab-created diamond with certificate.
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. We can provide Excellent cut diamonds upon request.
Get help with the perfect size.
Get help finding out the perfect ring size with our ring size service available with any ring purchase from Serendipity Diamonds.
Do you need guidance?
Get in touch for friendly, helpful guidance on regular engagement rings and our bespoke design service. We offer free, impartial advice on all aspects of your purchase, from diamond grading and precious metals to finance.
Mount only and Starlight Moissanite ring options
We now provide most of our ring styles in two further choices. Firstly, we create finished ring mounts available for your own diamonds or gemstones. In addition, we provide a range of add-on services, including stone setting and inward insurance, to cover items sent to us for setting.
Also, we offer most of our engagement rings with Moissanite instead of a diamond. This provides an ethical and affordable alternative to a natural or lab-grown diamond (also available) available across most of our ring styles. Look for the Starlight Moissanite or mount-only tabs, or contact us for a personal quote on any ring design.
The Serendipity Diamonds difference.....
Expert help and guidance
60 days returns
Free fully insured delivery
Complimentary size adjustment
Luxury packaging
Complimentary slimline pocket box
Lifetime warranty
Includes insurance valuation
0% Interest free finance available in the UK
Recent Customer Reviews
Date | Product | Score | Customer Comment | Supplier Response |
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09-Nov-2019 |
Trinity - R3D005. 3 stone, Princess cut diamond engagement ring, created in Platinum, 0.70cts
|
Service rating : Perfect. Only word needed Anonymous |
Service rating : A very big thank you for taking the time to leave a review.We are very much humbled by this. Our whole team would ... | |
24-Jan-2019 |
Trinity - R3D005. 3 Stone Princess Cut Diamond Engagement Ring Created in 950 Platinum
|
Service rating : Fantastic experience from start to finish.. Anonymous |
Service rating : Thank your friend first of all for recommending you and thank you for taking the time to leave such a lovely revi ... | |
15-Apr-2018 |
Trinity - R3D005. 3 Stone Princess Cut Diamond Engagement Ring. Created in Platinum
|
Excellent customer service. Really put my mind at rest when making such a large purchase of an engagement ring. The resizing service is also excellent and so straight forward. Anonymous |
No Comment | |
28-Apr-2016 |
Trinity - R3D005. 3 Stone Princess Cut Diamond Engagement Ring. Created In 950 Platinum
|
Service rating : One of the best customer service experiences I have had. I had a number of queries to which they always responded quickly. The timescales were kept to and they kept me informed the whole way. Would highly recommned, cannot praise them enough. Anonymous |
No Comment | |
21-Jan-2015 |
Trinity - R3D005. Graduated Three Stone Engagement Ring, created in 18ct White Gold
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Service rating : Very helpful over the phone, describing the product very accurately. V prompt delivery. Anonymous |
HI Simon, many thanks for taking the time to leave your feedback, this is very much appreciated. I am glad that our team was able ... | |
30-Jul-2013 |
Trinity - R3D005. Graduated three Stone Princess Cut Diamond Engagement Ring.
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Perfect, the new fiancé loves the new ring +++++ Anonymous |
No Comment | |
28-Feb-2013 |
Trinity - R3D005. A Graduated 3 Stone Diamond Engagement Ring
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Service rating : All the staff were incredibly helpful and responsive. A truly great shopping experience. Thank you. Anonymous |
No Comment | |
27-Jun-2012 |
Trinity - R3D005. A three stone Princess Cut platinum diamond ring.
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Service rating : I was exceptionally happy with all aspects of your companies process. You were very professional yet rather personal also. Thank you. Anonymous |
No Comment | |
30-Mar-2012 |
Trinity - R3D005. A Three stone Princess Cut Diamond Engagement Ring
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When I visited from London to look at their collection, I felt very welcome and at ease in an environment I knew absolutely nothing about. Mark, at no point, was trying to sell me anything, he was simply trying to be as helpful as possible and give me the best possible advice. Within a few a minutes... Anonymous |
No Comment |










