Ethically Sourced & Made
Jewellery Certificate Included
Shipping Woldwide
1 Year Free Resizing Service

Tethys Ethical Pear Diamond Halo Platinum Engagement Ring

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Order today and get it by Saturday 25 November 2023
  • * 100% recycled platinum

    * Central diamond: 0.7ct - 1ct / Canadian origin / Pear cut / Average clarity VS - SI / Average colour grade E - H

    * 0.2ct of small conflict-free diamonds, grain-set into a halo and in the band's shoulders 

    * We guarantee that our diamonds come from conflict-free sources and are harvested in a responsible manner. Learn more

    * 2mm band width

    Created in the UK by skilled craftspeople in Hatton Garden, London

    * Pictured is a sample ring containing a Cubic Zirconia of approximately 5mm x 8.5mm (roughly equal to a 1ct pear shape diamond)

  • Whether you're measuring your own ring size or trying to suss out your partner's, ring sizing is a nuanced art that can be tricky to get right. Luckily, we're here to make your mission as easy as possible. Learn more.

    Ring sizer loan

    Not being able to visit us in person doesn't mean you're denied access to the best customer service we can offer. For a refundable deposit of £15 we'll lend you one of two types of ring sizing tool, along with some handy tips for measuring yourself up from home. Order your ring sizer loan.


    Printable ring sizer

    Alternatively, you could also try using our printable ring sizer. Use this with a ring that either you or the person you're purchasing for currently wears. It's best to choose a ring that's similar in style to the one you want to buy, too. Then, follow these instructions: 

    1. Print this page at 100% size.

    2. When setting your print options you must ensure the options to fit or shrink to page ARE NOT selected.

    3. Print the document, then with a ruler or tape, measure the outer box to ensure it matches the dimensions marked.

    4. Hold your selected ring against the circles on the chart.

    5. Choose the letter that best matches the internal diameter of the ring.

    6. This is the ring size you should order.

    You can also download a PDF version of the ring sizer.


    Can't find your ring size on the website?

    If you can't find your size in the drop-down menu, just send us an email with your requested size and we'll send you a quote. If it is just one or two sizes smaller or bigger than the last size available on the website, the price will remain the same. 

  • Our ready-to-wear engagement rings are raring to go and boast a delivery time of just three working days. Custom-made bridal jewels take approximately eight weeks from the order date to be created. Should we foresee any hold-ups with the manufacture of your jewel, we'll let you know as soon as possible. Please contact us to learn more about estimated delivery times. 

    Jewellery from our silver collections are processed and delivered within three to four working days.

    How much do we charge?
    Service Provided
    Expected Delivery time
    UK Insured Delivery
    £7.95 / FREE with purchase over £300
    Royal Mail Special DeliveryTM
    1- 4 Working Days
    EU Standard Delivery
    Royal Mail International Tracked & Signed
    3-5 Working Days
    EU Priority Insured Delivery (for orders over £800)
    1-2 Working Days
    International Standard Delivery**
    Royal Mail International Tracked & Signed
    Approx 4-7 Working Days
    International Priority Insured Delivery (for orders over £800)
    Approx 2-3 Working Days


    * Zones that are not covered by Royal Mail Airsure® will be sent via Royal Mail International Signed ForTM

    For further information click here

    If you have any further questions, please feel free to get in touch. 

  • Bespoke commissions, engagement rings and wedding bands

    All ready to wear engagement rings may be returned for a full refund, provided they are returned in their original condition and packaging within 30 days of the original purchase. Likewise for any silver jewellery from our collections. Please see below for return instructions.

    There are NO REFUNDS or exchanges for bespoke commissioned jewels, collection wedding bands or collection engagement rings, as these items are made to order and specially manufactured to your requested specifications. However, if the item is found to be faulty, Lebrusan Studio reserves the right to repair the item first or re-make the item for you.

    For further information please click here.


    How to make a return

    Full priced items eligible for returns must be returned within 30 days of the original purchase. Discounted items must be returned within 14 days of the original purchase.

    Before returning your item, please call us or send an email to obtain your unique RAN number. This will enable us to identify your return and ensure the quickest possible refund.

    * Refunds from within the UK are free of charge. Once you've posted your package please email us with proof of postage cost (e.g. an image of your Post Office receipt) and we'll ensure that you're refunded the full value of postage.

    ** Postage for EU and international returns and exchanges must be covered by the customer and is non-refundable.

    Purchases must be returned exactly as they arrived. Please ensure that items are returned in their original condition and original packaging, with proof of purchase and a clearly written RAN number inside the parcel.

  • How long will my order take to arrive?
    If you've purchased a silver item, we aim to post your order within three to four working days. From the order date, our made-to-order wedding bands, engagement rings and commitment rings usually take around eight weeks to complete, but if you need yours sooner, please let us know and we'll see if we can meet your deadline. We endeavour to provide an exceptional, personalised service to all clients.


    Do you have a showroom where I can try your wedding and engagement rings?

    If you'd like to see our jewellery's extraordinary craftsmanship in person or try some rings on for size, come and visit us at our London or Brighton showrooms.


    How will I know if my chosen item is ethically sourced?

    At Lebrusan Studio we only use recycled, Fairtrade and Fairmined metals and variety of ethically sourced diamonds and gem.stones. You'll find detailed descriptions of the manufacturing processes and materials used on the listing page of each collection item. Your Lebrusan Studio jewel will also come accompanied with a unique certificate of provenance, detailing its journey into fruition and verifying exactly what it's been crafted from.


    I cannot find my size in your website. What if my finger size is bigger or smaller than the sizes listed? Can you still make my ring?

    Yes - just drop us an email for a quote and advice on how to go about ordering. Requests for smaller sized rings will be quoted at the same price as the smallest ring size available on the website. Larger sizes tend to be a little more expensive.


    Are the wedding/engagement rings available in a matt or hammered finish?

    Yes, they are. Simply select the 'polish' option and drop us an email with your order number, specifying whether you'd like your ring with a matte or hammered finish. 


    Is there any difference in colour between recycled gold, Fairtrade Gold and Fairmined Ecological Gold?

    No. No matter the provenance of the gold you choose, its colour - whether yellow or white - will be reliable. There are some differences between 9ct and 18ct gold, though - see the next point.


    Is there any difference between 9ct gold and 18ct gold?

    Yes. The difference is metal hardness; 9ct is softer and thus slightly less durable than 18ct. There's also a difference in colour when it comes to yellow gold; 9ct yellow is always slightly whiter in hue than 18ct. We always recommend 18ct gold for wedding and engagement rings, as these are everyday pieces that must be able to withstand wear and tear. 

    Can you make palladium wedding bands?

    Yes, we can. Palladium is a white metal similar in appearance to 18ct white gold and it's becoming increasingly popular for men’s rings, despite its current high price. It's lighter than white gold and it's perfect for 4mm, 5mm or wider bands due to its hardness. Just drop us an email stating the design you'd like along with your ring size, and we'll send you a quote. The current price for palladium bands is approximately 50% higher than 18ct gold.

    Will I be allergic to your wedding bands?

    Allergies to gold or platinum are rare, with silver actually the most common metal allergy - but that doesn't mean to say it's not a possibility. To try and avoid allergic reactions, our white gold bands are made using an alloy of palladium, a very pure metal which very rarely causes allergies. 

    Where will my jewellery be made?

    We're proud to say that 100% of our jewellery is Created in the UK. Whilst the majority of our metal casting takes place in Melton Mowbray, all finishing processes - that's polishing, hand-engraving, stone-setting and hallmarking - takes place in specialist workshops in Hatton Garden, London's famed jewellery quarter.

    Is your jewellery vegan? 

    Aside from our sustainably harvested Tahitian pearls, our jewellery contains absolutely no direct animal products. That said, we cannot guarantee that the equipment or products employed throughout the manufacturing process are 100% vegan. For example, beeswax is sometimes uses to lubricate drills and saw blades, whilst leather is often present at jewellers' benches to catch small pieces of metal. Such are common practises for many jewellery manufacturers. On rare occasions, we may also transport particularly delicate pieces of jewellery inside small leather pouches. If you are vegan and wish to discuss this matter in more depth with us, please don't hesitate to reach out. 


    How does Lebrusan Studio's bespoke service work?

    It's very simple. Start by taking a moment to visit our bespoke engagement ring, bespoke wedding band and bespoke jewel galleries. If you're inspired by what you see, drop us an email outlining what it is you’re after, along with an indication of your budget and ideal time frame. To move forwards, a bespoke consultation tends to be the most productive step. Once we've finalised your design and received your initial deposit, the production process should take 8-12 weeks. You can view a more detailed explanation of the bespoke service here.

    How much does your Bespoke Service cost?

    It all depends on the design and materials used, but generally speaking, our bespoke engagement rings start at £2,500,our bespoke wedding bands at £1,500and our bespoke heirloom jewels at £3,000. We only create bespoke items in platinum or 18ct gold.

    What can I do if I have other questions?

    Just drop us an email ( or send us a text (+447946942350). We will endeavour to answer you as soon as possible - most enquiries are usually responded to within a day.  


A homage to its elegantly droplet-shaped centre piece, this impactful engagement ring is named after Tethys, the Titan goddess of water... And a goddess she is fit for! Ideal for she who thrives in the spotlight, its halo setting is an attention magnet, cleverly enlargening the appearance of the centre stone. Add some strategically grain-set shoulder diamonds to the equation and this engagement ring's talent is in its ability to reflect light from almost every angle, promising maximum sparkle. A contemporary choice, its pear-shaped head is flattering on the hand, appearing to elongate the finger.

Whether you opt for freshly-mined or recycled materials, your loved one will be thrilled to hear that her engagement ring has had minimal impact on our beautiful planet. If you're set on opening the next chapter of your lives with a brand new jewel, Fairtrade Gold and a traceable, conflict-free Canadian diamond are the choice for you. If environmental sustainability is a priority of yours, choose to give recycled gold and a reclaimed diamond a fresh lease of life, avoiding the need for further mining in doing so.

Like a badge of honour, the Created in the UK mark will be branded on the inside of your band by the Assay Office alongside its hallmarks; proof of authentication and provenance. You will also receive detailed information about your jewel's origins and manufacturing journey in your unique certificate of provenance.

At the moment, the pre-loved diamonds most readily available to us are old-cut. However, due to popular demand and the rarity of pre-loved diamonds in general, the option to go recycled is dependent on availability at the time of purchase. Because of limited availability, sourcing a recycled stone - be it a round brilliant-cut or an old-cut diamond - could take a little longer than sourcing one that's newly-mined. If we're unable to find a recycled stone with the appropriate specifications within the necessary timeframe, we'll get in touch with you to arrange an alternative.

Included in your order:

  • Jewellery certificate - to reassure you and your partner that this ring has been made using the most ethical materials available
  • Free resizing within the first year for UK customers. (To discuss resizing of international orders, please get in touch)
  • Ring box
  • Free UK tracked and insured delivery

    Place your order today and you will get your shining ring in around 8 weeks. 

    Need it faster? Contact us and we’ll do our best to speed up your order.