Platinum Oval Cut 2.59 Carat Natural Opal & Round Brilliant Cut 0.67 Carat Diamond Ring - Size M
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At the centre of this platinum ring sits a 2.59 carat natural opal, displaying vivid green and deep blue hues across its smooth, oval surface. The gemstone is surrounded by round brilliant-cut natural diamonds, with additional diamond detailing extending along the shoulders. The contrast between the opal's rich colours and the surrounding diamonds gives the ring a striking appearance.
The natural opal displays play-of-colour, with areas of green and blue changing in intensity as the light and viewing angle shift. Surrounding the gemstone are 36 round brilliant-cut natural diamonds with a combined weight of 0.67 carats. Graded F in colour and SI in clarity, the diamonds provide brightness around the opal, with their faceted surfaces contrasting against the smooth central gemstone.
As October's birthstone, opal makes this ring particularly relevant for October birthdays. It is also suitable for wedding anniversaries, milestone celebrations and other significant occasions. The combination of natural opal and diamonds offers an option for those seeking a statement ring featuring a coloured gemstone.
The raised platinum setting gives the oval opal prominence, while the diamond-set shoulders extend the detailing towards the polished band. The central arrangement covers a noticeable area across the top of the finger, giving the ring a substantial presence when worn. Its design is particularly suited to being worn on its own for evening events and formal occasions.
Part of the appeal of natural opal is that each stone displays its own pattern and distribution of colour. The patches of vivid green against deeper blue tones give this particular opal an individual appearance, with the colours revealing different details as the gemstone catches the light.
Delivery Information
UK Shipping
We are pleased to offer FREE shipping on all UK orders. All items sent to UK customers are fully insured for added peace of mind.
The table below provides a breakdown of our shipping rates based on the selling price of your order, including VAT and any discounts.
| Selling Price | Royal Mail 48 Tracked |
Royal Mail 24 Tracked & Signed |
Special Delivery Next Day Orders placed Mon–Fri |
Special Sunday Delivery Orders placed before Saturday 12pm |
Royal Mail Special Delivery By 1pm |
|---|---|---|---|---|---|
| £0 to £99.99 | FREE | £4.99 | £7.99 | £7.99 | £9.99 |
| £100 to £499 | N/A | FREE | £7.99 | £7.99 | £9.99 |
| £500 or more | N/A | N/A | FREE | £7.99 | £9.99 |
We know your order is important to you, so we use Royal Mail’s tracked delivery service on all UK orders.
We also offer Royal Mail Special Delivery, which for an additional fee offers guaranteed delivery the next day before 1pm.
*Royal Mail Tracked 24 and Royal Mail Tracked 48 services are 98% accurate but not guaranteed.
UK orders placed before 4pm Monday–Friday are dispatched the same day. Orders placed on Saturday or Sunday are dispatched on the following working day.
We are not open during UK bank holidays. Orders received on bank holidays will be dispatched promptly the next working day.
International Shipping & Duties
We’re pleased to offer worldwide delivery with fully tracked and insured shipping.
To make international delivery clearer, our shipping terms vary depending on the delivery country. Some destinations are shipped with duties and taxes included, while others may require local import charges to be paid before delivery.
DDP Destinations
For orders delivered to the USA, Canada and the European Union countries listed below, we ship on a DDP (Delivered Duty Paid) basis.
This means the price you pay at checkout includes:
- Your goods
- International shipping
- Applicable import duties
- Applicable taxes/VAT
- Customs clearance charges where applicable
Duties and taxes are included at checkout for the countries listed below. This means you should not be asked to pay additional import fees before delivery.
Countries currently shipped with duties and taxes included
North America
- United States
- Canada
European Union / Eurozone
- Austria
- Belgium
- Bulgaria
- Croatia
- Cyprus
- Estonia
- Finland
- France
- Germany
- Greece
- Ireland
- Italy
- Latvia
- Lithuania
- Luxembourg
- Malta
- Netherlands
- Portugal
- Slovakia
- Slovenia
- Spain
European Union / Non-Euro Currency Countries
- Czech Republic / Czechia
- Denmark
- Hungary
- Poland
- Romania
- Sweden
If your delivery country is listed above, duties and taxes are included at checkout and you should not be asked to pay additional import duties or taxes before delivery.
Please note that delivery times can still vary if customs require additional checks, but any applicable duties and taxes should already be covered where DDP has been selected and charged at checkout.
Rest of World — DAP
For all other international destinations outside of the countries listed above, orders are shipped on a DAP (Delivered At Place) basis.
This means the price you pay at checkout covers:
- Your goods
- International shipping
It does not include overseas sales tax, import VAT, customs duties, tariffs, or courier clearance/handling fees.
When your order reaches your country, local customs authorities may apply additional charges, including:
- Import VAT or local sales tax
- Customs duties or tariffs
- Courier handling or clearance fees
These charges are set by your country’s customs authority and are payable by you before delivery.
If charges are due, you’ll usually be contacted directly by the courier with a secure link to pay any applicable fees. Once cleared, your parcel will be released for delivery.
Estimated Delivery Times After Dispatch
Customs processing times vary by country and may extend delivery slightly.
If Import Charges Are Not Paid
For DAP shipments, if local import charges, taxes, duties or courier fees are not paid, or if delivery is refused, the parcel may be returned to us.
In this case, we will refund your order minus:
- The original outbound shipping cost
- Any return shipping fees charged to us
- Any customs, duty, tax or clearance fees billed to us by the courier
Estimating Import Costs for DAP Countries
Import VAT, duty and tariff rates vary by country. For an estimate, please contact your local customs authority or use your government’s official import calculator before placing your order.
If your delivery country is listed as a duties and taxes included destination above, your order will be shipped on a DDP basis.
More about delivery...
cestria fine jewellery
Fine jewellery. exceptional value.
Created in Chester by the team behind WatchNation, CESTRIA was founded on a simple belief: beautiful fine jewellery shouldn't come with an unnecessary premium.
Through our direct relationships with specialist jewellery partners, we're able to offer carefully selected natural diamond and gemstone jewellery, beautifully crafted in gold and platinum, at exceptional value.
We'd rather put the value into the jewellery itself than the markup.
With independent AGI documentation on eligible pieces, premium presentation and genuine personal service, we believe the experience should be just as considered as the jewellery itself.
Understanding your stones
Diamond education
Diamond clarity
Every natural diamond has its own characteristics. Diamond clarity refers to the presence of tiny internal features, known as inclusions, and external imperfections, called blemishes.
Clarity is graded from Flawless (FL) through to Included (I3), based on how noticeable these characteristics are when examined under 10× magnification. Generally, the fewer and less visible the inclusions, the higher the clarity grade.
Many inclusions are difficult to see without magnification, meaning diamonds across different clarity grades can still appear beautifully clear to the naked eye.
Our guide illustrates the different clarity grades to help you better understand the diamonds used in CESTRIA jewellery. The specific clarity grade or range for each piece can be found in its product specifications and accompanying documentation, where available.
Gemstone guide
Gemstone details
Natural gemstones often contain tiny internal features known as inclusions, formed during their development deep within the Earth.
Far from always being imperfections, these characteristics can give rubies, sapphires and emeralds their individuality. They're particularly common in emeralds, where their intricate patterns are often referred to as jardin, meaning garden.
While the type and visibility of inclusions can influence a gemstone's quality and value, they are also part of what makes each natural stone distinctive. No two are quite alike.
Need help?
Frequently Asked Questions
An AGI Diamond Identification Report is an independent assessment providing information about a diamond's key characteristics, including its carat weight, colour, clarity and cut.
Where included, this documentation gives you additional reassurance and a clearer understanding of the diamonds in your chosen jewellery. The exact reports supplied with each CESTRIA piece are detailed in its product information.
Eligible CESTRIA jewellery is supplied with an independent insurance valuation, providing an estimated replacement value for insurance purposes.
This documentation can be useful when arranging jewellery insurance and provides an additional record of your purchase. The insurance valuation is separate from the price you've paid and doesn't represent a guaranteed resale value.
Our collection features natural diamonds and precious gemstones, including rubies, sapphires, emeralds and opals.
Each piece is individually described, with details of the gemstones, precious metals and relevant characteristics provided in the product specifications.
Natural gemstones can display subtle variations in colour and inclusions, which contribute to their individual appearance. Any known treatments should be disclosed in the relevant product information.
We understand that getting the perfect fit is important, especially when choosing a ring for someone special.
Professional resizing is available for suitable designs, although this depends on the ring's setting, construction and the gemstones involved.
If you're unsure about sizing or would like a ring adjusted, please contact our team before ordering. We'll be happy to advise on the available options, any associated costs and expected timescales.
Every CESTRIA piece is carefully presented in a premium branded jewellery box, designed to make your purchase feel special from the moment it arrives.
Where applicable, your jewellery will also include its accompanying AGI identification documentation and insurance valuation.
Whether you're purchasing for yourself or choosing a gift, we want the presentation to reflect the quality of the jewellery inside.
Your CESTRIA jewellery is carefully packaged and sent securely using a tracked, signed-for and insured delivery service.
For UK orders, we use Royal Mail Special Delivery, providing tracking throughout its journey and the reassurance of a signature upon delivery.
You'll receive your tracking information once your order has been dispatched. Delivery estimates are provided during checkout, and we'll let you know if your piece requires additional preparation or sizing.
We want you to be completely happy with your purchase.
Eligible jewellery can be returned in accordance with our returns policy. For a change-of-mind return, please contact us within 14 days of receiving your order. Jewellery should be returned carefully packaged, together with its original presentation box and accompanying documentation.
Customised or altered jewellery may be subject to different return conditions, so please check with our team before arranging any resizing or personalisation.
Your statutory rights relating to faulty or misdescribed goods are unaffected.
Declare withdrawal
Please fill out the following form to declare your withdrawal from the contract.
