6.50 Carat Treated Blue Sapphire and Diamond Halo Ring in 18ct White Gold

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This Blue Sapphire ring is stunning! It features an approximately 6.50 carat cushion-cut Blue Sapphire which has been treated with beryllium diffusion. Beryllium diffusion is a heat treatment which introduces beryllium (a rare, natural element present in many gemstones) into the chemical structure of the gem to improve its colour. It's important to note that while this treatment is stable, it can result in uneven colour, however you likely would only see evidence of that if you were to have this gem re-cut quite dramatically. This Sapphire also has some colour zoning, which is also common in natural gems. 

Overall, this is a gorgeous, sizeable Blue Sapphire which was mined from the Earth and probably started its life as pretty pale, low-intensity gem. If you don't mind the idea of science giving nature a bit of a helping hand, this could be the jewel for you, especially at this remarkable price point. 

The Sapphire is surrounded by approximately 1.50 total carats of beautiful brilliant-cut Diamonds and set in 18ct White Gold. The setting is substantial and lovely quality.

This ring is a size M (US 6) and can be sized to fit. If you need an alternate size, please write it in the Notes section upon checkout and we are happy to size it accordingly, free of charge. Please note, re-sizing can add up to two weeks to delivery times and your purchase will still be returnable for a full refund, as per our Refund Policy.

All of our rings come in a beautiful velvet box, as seen in our pictures. Please note the colour you would prefer in the Notes section, or, leave it blank and we’re happy to surprise you with the colour we think will best suit your beautiful new item!

We can accept all major credit and debit cards and you can also checkout using PayPal, click “checkout” to be guided through all the options. 

If you have any further questions about this item, or would like to request more photos, please contact us and we will get back to you as quickly as possible.



Modern (20 years old)


Dress/Engagement Ring  


18ct White Gold


M – can be sized



Centre Stone

Blue Sapphire (Treatment - Beryllium Diffusion)



Carat Weight

6.50 ct (approximate)



Accent Stones


Total Carat Weight

1.50 ctw