Engagement Ring Petra 0. 25ct Lab Diamond H/Si in 18K White Gold
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How much can I borrow?
Provide some basic information and we’ll let you know if you are likely to be approved for finance as well as how much you could borrow.
Finance available from £13.76/month -
20 months interest-free on orders over £2,000
Finance amount: £459
Soft Check how much you can borrow - Click Here
| DEPOSIT | TERM IN MONTHS |
MONTHLY PAYMENT |
APR | TOTAL FINANCE |
AVAILABLE WITH |
|---|---|---|---|---|---|
| £45.90 | 6 | £68.85 | 0.0% | £413.1 |
|
| £45.90 | 10 | £41.31 | 0.0% | £413.1 |
|
| £0 | 6 | £76.5 | 0.0% | £459 | 
|
| £0 | 12 | £38.25 | 0.0% | £459 |
|
| DEPOSIT | TERM IN MONTHS |
MONTHLY PAYMENT |
APR | TOTAL FINANCE |
AVAILABLE WITH |
|---|---|---|---|---|---|
| £45.90 | 12 | £36.74 | 12.9% | £441 |
|
| £45.90 | 24 | £19.48 | 12.9% | £468 |
|
| £45.90 | 36 | £13.76 | 12.9% | £495 |
|
| £0 | 24 | £21.16 | 9.9% | £508 |
|
| £0 | 36 | £16.34 | 16.9% | £588 |
|
Regalian Limited t/a The Diamond Store is authorised and regulated by the Financial Conduct Authority and acts as a credit broker and not a lender, offering finance products from a restricted range of finance providers.
PayPal Credit is a trading name of PayPal UK Ltri, 5 Fleet Place, London, United Kingdoms ECAM 7RD. Your actual interest rate and credit limit may vary depending on your
Product Price: £1,599
Deposit: £159.90 (10% minimum required)
Loan Amount: £1,439.10
Item Ref: NDUT26-47JUY.F.0
SKD-certified diamonds have been graded by SK Diamonds, known as SKD for short.
SKD are a group of well-respected diamond gemmologists, based in London.
The SKD experts use a range of analytical tools that help them establish a grade for the diamond. Each diamond is carefully and thoroughly examined by a SKD gemmologist with years of experience.
An SKD diamond report will give you complete peace of mind. It guarantees the diamond you are buying has been independently verified to be exactly what the retailer says it is.
Does this make an SKD-certified diamond more valuable?
Yes. If you ever need to sell your diamond, then the SKD certificate is a good way for any buyer to reliably verify the diamond they are purchasing.
The SKD certificate, together with all the documents of ownership that we send to you, makes your diamond more valuable than one without all this supporting documentation.
Is this diamond conflict free?
Yes. All the diamonds sold by us, including our range of SKD certified diamonds, are conflict free.
Free Worldwide Delivery
We offer FREE worldwide delivery by DPD or DHL on all our products. See below for specific delivery information.
UK Next Day Delivery
Certain products are eligible for Next Day Delivery via DPD (UK & Northern Ireland only) if ordered before 12pm UK time, Monday to Thursday (excluding bank holidays). Friday, Saturday & Sunday orders will be shipped the following Monday. UK Same Day Delivery – London Postcodes Only We now offer same day delivery on select items for £35 when you order by 2pm, Monday to Thursday or by 11:30am on Friday. Our courier delivers to all London based postcodes.
Qualifying postcodes: SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, W1, W2, W3, W4, W5, W6, W7, W8, W9, W10, W11, W12, W13, W14, EC1, EC2, EC3, EC4, SE1, SE2, SE3, SE4, SE5, SE6, SE7, SE8, SE8, SE9, SE10. SE11, SE12, SE13, SE14, SE15, SE16, SE17, SE18, SE19, SE20, SE21, SE22, SE23, SE24, SE25, SE26, SE27, SE28, NW1, NW2, NW3, NW4, NW5, NW6, NW7, NW8, NW9, NW10, NW11, N1, N2, N3, N4, N5, N6, N7, N8, N9, N10, N11, N12, N13, N14, N15, N16, N17, N18, N19, N20, N21, N22, E1, E2, E3, E4, E5, E6, E7, E8, E9, E10, E11, E12, E13, E14, E15, E16, E17, E18, E19, E20, WC1 and WC2.
UK delivery times:
We aim to dispatch all jewellery within 24 hours of receiving your order. However, due to the volume of product we offer, it is not always possible to have every item in stock. This means that we may need to handcraft a ring just for you, or adjust the size of an item before we send it out. If we’re unable to dispatch your order immediately we’ll give you an estimated dispatch date. In any case, we will always email you with a dispatch date within 8 hours* of receiving your order. (*This response time applies during our office opening hours: Monday to Friday, 9am – 5pm. If you place your order outside of these times, we will contact you the next working day.)
Our UK delivery method
For all UK orders we use DPD. This is a secure, insured and speedy delivery method. On dispatch, we’ll email you with information on how to track your order. Your jewellery is insured during transit. It will require a signature when delivered to the address you gave us.
International (non UK) Orders & Taxes We aim to dispatch all jewellery within 24 hours of receiving your order. We have partnered with Globale for all Non-UK Orders and offer:
If we’re unable to dispatch your order immediately we’ll give you an estimated dispatch date. Typically, our dispatch times (depending on the piece you ordered) are either 3 days, 5 days or 7-10 days.
Delivery times to Europe & rest of the world
Below you’ll find the estimated DHL transit times to different parts of the world (please note that DHL delivery times apply to working days, excluding weekends and bank holidays)
*Please note that we cannot currently deliver to Brazil, Kuwait, Malaysia, India, Indonesia, Mexico, Switzerland and Portugal. For more information about EU countries and Australia please read here.
EU & International delivery methods
For all International orders, we use DHL. This is a secure, insured and speedy delivery method. On dispatch we’ll email you with information on how to track your order. Your jewellery is insured during transit. It will require a signature when delivered to the address you gave us.
International Import duties and taxes
All taxes and duties are shown (if applicable) at checkout. For the European Union and many other countries, all taxes and import duties are taken care of by us.
COUNTRIES WE CANNOT SEND TO
If you have a specific deadline: We always work hard to meet any special delivery requirements you may have. Should our estimated delivery time not suit you, please contact us and we will try our hardest to meet your requirements. If we cannot deliver by your special deadline, we will always let you know.
You can email us on customerservice@thediamondstore.com. Please remember to include your order number You can also check the status of your order here – simply log in with the email address and the password you created when you first placed an order with us.
30 Days Returns / 60 Days Exchange
Our Returns Policy
We want you to feel completely confident when you shop with us. That’s why we offer FREE 30-day returns for refunds and 60-day exchanges across the UK and Northern Ireland.
If you’ve ordered a ring between a size I(i) and a size R, don’t worry we’re happy to offer one free exchange or resizing if it doesn’t fit. However if it falls outside of the mentioned size range a fee may be applied where applicable to resize or exchange
Cancelling an Order Before Dispatch
Changed your mind? No problem — you can cancel your order anytime before it’s been dispatched.
Just reach out to our friendly team via Live Chat, by email at customerservice@thediamondstore.com, or give us a call on 0345 084 1200 (or +44 345 084 1200 if calling from outside the UK). Please have your order number handy to help us assist you as quickly as possible.
Product Measurements
Please note that for rings smaller than size J or larger than size Q, the width may vary slightly (up to 10%) due to the crafting process. If you need any adjustments, we’re happy to help.
Damaged or Defective Items
If your item arrives damaged or defective, we’ll make it right — fast. We’ll either repair or replace it at no cost to you, or provide a refund once it’s been assessed by our head jeweller.
Our standard returns policy is 30 days to return, and 60 days to exchange.
5-Year Warranty
We stand by the quality and craftsmanship of our jewellery. That’s why every piece comes with a 5-year warranty covering manufacturing defects in materials or workmanship. In addition, all our jewellery is fully hallmarked in accordance with UK legislation, certifying its authenticity and origin.
Please note, this warranty does not cover damage resulting from general wear and tear, accidental damage, loss, theft, or improper use. For added protection, we recommend taking out specialist jewellery insurance.
How Refunds Work
Once we’ve received and inspected your returned jewellery, we’ll process your refund right away and email you to confirm. Depending on your bank or payment provider, it may take 3 to 5 working days to show up on your statement.
We’ll always refund you via the same method you used to make your purchase — whether that was credit or debit card, PayPal, Pay4Later Finance, bank transfer, or another option.
To avoid delays, make sure to include the returns label print-out with your parcel. This helps us identify your return quickly.
Ethically Sourced Diamonds
We’re proud to say that all our diamonds are conflict-free and fully compliant with United Nations regulations. When you buy from us, you’re choosing ethical beauty.
Need Help? Get in Touch
We’re here whenever you need us.
📧 Email us: customerservice@thediamondstore.com or returns@thediamondstore.co.uk
📞 Call us: 0345 084 1200 (UK) or +44 345 084 1200 (International)
5-Year Warranty
At The Diamond Store, we take great pride in the quality of our jewellery. Every piece is skilfully crafted to last for many years to come. That’s why we offer a 5-year warranty against manufacturing defects in materials or craftsmanship.
What The Warranty Covers:
If a manufacturing fault is found in the way your jewellery was made, we will repair, remake, or replace it at no cost to you, within the first 5 years after purchase.
What’s Not Covered:
Our warranty does not cover accidental damage, wear and tear, loss, theft, or any work carried out by another jeweller. For example, damage from catching a ring on a door handle, losing an earring in a waste disposal unit, or vacuuming up a bracelet would not be covered. If a piece has been altered or resized elsewhere, the warranty becomes void.
Returns & Peace of Mind
We also offer a 30-day money-back guarantee (excludes custom-made items). Click here to view our full Return & Refund Policies.
Conflict-Free & Fully Certified
All our natural mined diamonds are conflict-free, and every piece of gold, silver, and platinum jewellery is hallmarked in the UK to verify its purity and authenticity.
If Something Goes Wrong
Whatever the issue - whether it's our fault or yours - we encourage you to send the item to us for assessment. If it’s a manufacturing issue, we’ll repair it free of charge. If the damage was accidental, we’ll quote a fair repair cost with no obligation. Either way, we’re here to help.
Need Extra Protection?
For accidental loss or damage, we recommend taking out jewellery insurance with worldwide cover. We partner with the experts at Assetsure. Find out more about jewellery insurance.
To keep your surprise safe, the outer packaging that we deliver your jewellery in is plain.
On the outside, our plain postal package does not say The Diamond Store anywhere, nor state what the contents are.
So if you’re buying a gift for someone who lives in the same address as you, your secret will remain safe – as long as they don’t open the package!
On the inside, however, you’ll find your beautiful jewellery, along with our stylish gift presentation set, ready for your special occasion.
(We’re also proud to say that our sustainable packaging is Forest Stewardship Council approved, which means its production hasn’t harmed the world’s forests – find out more here.)
Watch the video below or click here to discover exactly what’s inside the inner gift presentation box.
When you purchase any jewellery from our website, you can choose to include a complimentary personal message with your order, for each piece. Each message is credit‑card sized and makes a gift feel extra special.
On each product page, you’ll see a field where you can write your personal message before adding the jewellery to your basket.
If you’re ordering multiple pieces for different people, you can add a different personal message for every item in the same order.
We’ll print each message onto a beautiful credit-card sized note for you to include in their gift.
You may personalise each card as you wish, up to the space available.
We can print all British letters (A–Z) and digits (0–9). Unfortunately, special characters and emojis aren’t supported, so please don’t include these.
Every order arrives in plain outer packaging, ensuring privacy and surprise.
Inside, your jewellery is protected by our exclusive ready-to-gift presentation set, accompanied by your personal message card.
Our packaging is FSC‑approved, underlining our commitment to sustainable luxury.
Carbon Offset
Carbon Certificates
The Diamond Store is committed to combating climate change and sustaining our world for future generations through decarbonisation.
Carbon offsetting is a way to compensate for our emissions by funding an equivalent carbon dioxide saving elsewhere.
We work with Carbon Footprint™ to balance out emissions from our offices, warehouse, workshop and staff commutes.
We are also very stringent with our shipping services. Currently, 99.5% of our shipments go out with DPD couriers who are committed to a zero-emissions strategy.
For more information, please see the corresponding certifications below.
CARBON FOOTPRINT™ Our latest carbon offset certificate from Carbon Footprint™ shows how we support a global portfolio of Verified Carbon Reduction Projects.
CARBON CERTIFICATE FROM DPD
Our principal delivery company, DPD, which handles 99.5% of our shipments, is committed to a strategy of zero-emission deliveries.
In 2022, DPD was named Sustainable Business of the Year in the UK’s Business Champion Awards. The company has electrified 1,500 vehicles in its UK fleet, pledged to ‘deliver green’ to 30 large UK cities by 2023 and created the Eco Fund to support community-based sustainable projects.
Item Ref: NDUT26-47JUY.F.0
The exquisite round cut diamond solitaire in this exceptional engagement ring is a timeless and sparkling symbol of love. The H/Si quality lab grown diamond is white and sparkling, and complemented by a polished white gold band for a look and feel that's utterly luxurious.
*The sustainable luxury choice. Lab-grown diamonds are chemically and optically identical in brilliance and beauty to a natural mined diamond.
Opt for our sustainable lab grown diamonds set in ethically sourced metals for a beautiful, Earth friendly choice that gives you more carats for your spend.
Or choose our stunning, certified mined diamonds for an enduring legacy from the world's premier, conflict-free sources.
What Diamond Clarity is right for you
What would be the difference if you moved up a grade?
Your diamond will have extra sparkle and radiance that will catch the eye just that little bit more.
Which Diamond Size is right for you
Larger diamonds are rarer and more valuable, now and will also be in the future.
When considering the size, think about what she or your friends wear and how you would like to compare.
Which Setting Is Right For you
All our 18K Gold and Platinum rings are UK hallmarked
What Diamond Clarity is right for you
What would be the difference if you moved up a grade?
Your diamond will have extra sparkle and radiance that will catch the eye just that little bit more.
Which Diamond Size is right for you
Larger diamonds are rarer and more valuable, now and will also be in the future.
When considering the size, think about what she or your friends wear and how you would like to compare.
Which Setting Is Right For you
All our 18K Gold and Platinum rings are UK hallmarked
18K White Gold
Claw
Round
Diamond
Yes
Yes
Yes
Please note weights, gem colours and sizes are approximate and may vary slightly.
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Item Ref: NDE6222-GU.J.0
AVAILABILITY: In stock (1 item)
PRODUCT TYPE: Rings
VENDOR: The Diamond Store
A versatile and elegant luxury gift, this 'E' initial ring is made with dazzling diamonds in the finest sterling silver. Its romantic sparkle looks stunning on the hand. It could be the perfect birthday or anniversary present for someone you...
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Item Ref: NDE6222-QU.M.0
AVAILABILITY: In stock (1 item)
PRODUCT TYPE: Rings
VENDOR: The Diamond Store
Feel glamorous and special with this sparkling 'O' diamond initial ring set in beautiful sterling silver. Show off unique style with your own letter or wear a stacked look with all your loved one's initials. The sure-fire gift for anyone...
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Item Ref: ANDE6359U.F.0
AVAILABILITY: In stock (0 items)
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VENDOR: The Diamond Store
Discover our Gold Vermeil Entwine Rubover Half Band Eternity Ring, designed to perfectly pair with our Entwine engagement rings, the Entwine 0.42ct lab diamond wedding band in gold vermeil is a modern take on a timeless classic. Crafted in recycled...
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Item Ref: NDE6230U
AVAILABILITY: In stock (0 items)
PRODUCT TYPE: Rings
VENDOR: The Diamond Store
Discover the Lab Diamond Half Eternity Wave Ring, with 0.05ct of lab grown diamonds, set in the finest recycled 925 Silver. An excellent gift for any occasion, this diamond eternity ring can be given to mark a milestone, celebrate an...
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Item Ref: NDE6203U.G.0
AVAILABILITY: In stock (1 item)
PRODUCT TYPE: Rings
VENDOR: The Diamond Store
Discover our Lab Diamond Signet Ring with Round cut, showcasing a 0.25ct lab-grown diamond set in premium recycled sterling silver. This contemporary design reimagines the classic signet ring, making it a thoughtful gift or a luxurious treat for yourself. Perfect...
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Item Ref: NDE6206U.I.0
AVAILABILITY: In stock (1 item)
PRODUCT TYPE: Rings
VENDOR: The Diamond Store
Discover our Round Cut Wide Signet Ring, showcasing a 0.25ct lab-grown diamond set in premium recycled gold vermeil. This contemporary design reimagines the classic signet ring, making it a thoughtful gift or a luxurious treat for yourself. Perfect as a...
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Overall rating: 5.0 / 5 from 4 reviews.
Review topics: ["ring"].
"Great service"
"Amazing Ring!"
"Brilliant ring"
"Made my fiancee very happy thankyou"
LUXURIOUS PACKAGING
Every piece is packaged beautifully, ready to gift without the need for wrapping. Delivered discreetly, so no surprises are spoiled.
LEARN MORE
PERSONALISED MESSAGE
Personalise your gift with a heartfelt message, to make it extra special.
We want you to feel completely confident when you shop with us. That’s why we offer FREE 30-day returns for refunds and 60-day exchanges across the UK and Northern Ireland.
If you’ve ordered a ring smaller than a size J or larger than a size Q, don’t worry — these are custom sizes, but we’re still happy to offer a free exchange or resizing if the fit isn’t quite right.
Changed your mind? No problem — you can cancel your order anytime before it’s been dispatched.
Just reach out to our friendly team via Live Chat, by email at customerservice@thediamondstore.com, or give us a call on 0345 084 1200 (or +44 345 084 1200 if calling from outside the UK). Please have your order number handy to help us assist you as quickly as possible.
Please note that for rings smaller than size J or larger than size Q, the width may vary slightly (up to 10%) due to the crafting process. If you need any adjustments, we’re happy to help.
If your item arrives damaged or defective, we’ll make it right — fast. We’ll either repair or replace it at no cost to you, or provide a refund once it’s been assessed by our head jeweller.
Our standard returns policy is 30 days to return, and 60 days to exchange.
We stand by the quality of our jewellery. That’s why all our pieces come with a 5-year warranty against defects in materials or craftsmanship. Every item is also fully hallmarked according to UK legislation, confirming its authenticity and origin.
Once we’ve received and inspected your returned jewellery, we’ll process your refund right away and email you to confirm. Depending on your bank or payment provider, it may take 3 to 5 working days to show up on your statement.
We’ll always refund you via the same method you used to make your purchase — whether that was credit or debit card, PayPal, Pay4Later Finance, bank transfer, or another option.
To avoid delays, make sure to include the returns label print-out with your parcel. This helps us identify your return quickly.
We’re proud to say that all our diamonds are conflict-free and fully compliant with United Nations regulations. When you buy from us, you’re choosing ethical beauty.
We’re here whenever you need us.
📧 Email us: customerservice@thediamondstore.com or returns@thediamondstore.co.uk
📞 Call us: 0345 084 1200 (UK) or +44 345 084 1200 (International)
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What is the difference between our sustainable lab grown and conflict-free mined diamonds? Is it possible to tell them apart? We explain the differences in origin, quality and price between the two, so that you can make an informed choice.
They are exactly alike optically, physically and chemically.
The main difference is their origin:
Mined diamonds have been extracted from the Earth. They were created by Mother Nature from carbon atoms subjected to intense volcanic heat and pressure deep underground more than 3 billion years ago.
Sustainable lab grown diamonds are grown by scientists in a laboratory. They are created from a tiny shard of a mined diamond which is introduced to carbon atoms, under conditions which replicate the volcanic forces of Mother Nature.
Yes, lab grown diamonds are not extracted from the ground, which makes them environmentally sustainable and ethical as they conserve the Earth for future generations.
No. As long as you are buying mined diamonds from a reputable jeweller that abides by the Kimberley Process, your diamonds are ethical because they are conflict-free.
No, you cannot tell the difference between a lab grown diamond and a mined diamond by looking at them.
Therefore, to protect consumers, lab grown diamonds are branded with a microscopic laser mark to distinguish them from mined diamonds.
You cannot see this mark with your naked eye, but a jeweller will be able to see it with specialist magnifying equipment.
Yes, lab grown diamonds are more affordable than mined diamonds, giving you more carats for your budget.
You’ll find most of our popular jewellery ranges available in both options so you’ll be able to compare easily.
Bear in mind, however, that the precious metal setting plays a part in price. Silver is the most affordable, gold is a little more expensive, and platinum is the most expensive.
No, lab diamonds are not fake diamonds. Sometimes people confuse lab grown diamonds with simulants like cubic zirconia, which are not diamonds.
But this is not the case with lab diamonds. Gemmologists (the scientists who study diamonds and gemstones) classify lab diamonds, simply, as diamonds.
Learn more about the identical characteristics of lab diamonds here.
Mined diamonds and lab diamonds are quality-graded by gemmologists in exactly the same way using the Four Cs – Cut, Colour, Clarity and Carat weight.
Therefore, your diamond (regardless of whether it is lab grown or mined) will simply be graded at the quality it has, for example, Premium Quality, H/Si or E/Vs.
Having said that, since lab diamonds are more affordable than mined diamonds per carat, you’ll usually be able to access a much better diamond grade/quality for your budget if you choose lab grown.
“Better” is very subjective. It’s like cars. If someone asks you if an Aston Martin or a Ferrari is better, your answer would depend on your individual requirements.
It is the same with lab grown diamonds and mined diamonds.
Conflict-free mined diamonds are simply beautiful to look at and last a lifetime. A rare luxury created by Mother Nature, they come with the legacy of having been sourced from the Earth.
Sustainable lab grown diamonds are also stunning to gaze at, and they also last a lifetime. More affordable than mined diamonds, they are additionally sustainable and ethical.
In conclusion, both lab grown diamonds and mined diamonds are luxurious, beautiful and sparkling options – and they will both make wonderful gifts for a lifetime. Now, you simply have more choice.
If you have any questions, we’re always happy to chat. Just email us on customerservice@thediamondstore.com.
High quality grades of diamonds.
Because we only sell 5 different grades of diamonds, all of which are of a high quality, the diamond you have already chosen won’t have any obvious flaws. But if your priority is for your diamond to have the best possible quality and sparkle, then investing in the next grade up makes good sense.
What would be the difference if you moved up a grade? Your diamond will look more radiant, gain in value – and you’ll get the very best quality for your budget.
Upgrading the size of your diamond means increasing its carat weight
The more carats a diamond weighs, the bigger it is.
The larger the diamond is, the rarer it is to find. That’s why an increase in size is a larger investment. When considering the size, think about what she or your friends wear and how you would like to compare.
Below you can see the different diamond sizes we sell. If you’d like a real sense of scale, follow this link for “real size” printable images of our diamonds: Real size diamond measurements.
| Round Brilliant Cut Diamonds | Diameter mm |
|---|---|
| 0.10ct | 3.00mm |
| 0.20ct | 3.80mm |
| 0.25ct | 4.00mm |
| 0.30ct | 4.20mm |
| 0.40ct | 4.80mm |
| 0.50ct | 5.00mm |
| 0.70ct | 5.75mm |
| 1.00ct | 6.50mm |
| Square Princess Cut Diamonds | Width mm |
|---|---|
| 0.10ct | 2.50mm |
| 0.20ct | 3.20mm |
| 0.25ct | 3.40mm |
| 0.30ct | 3.60mm |
| 0.40ct | 4.00mm |
| 0.50ct | 4.40mm |
| 0.70ct | 4.80mm |
| 1.00ct | 5.50mm |
| Emerald Cut Diamonds | Length & Width |
|---|---|
| 0.25ct | 4mm x 3mm |
| 0.33ct | 5mm x 3mm |
| 0.50ct | 8mm x 4mm |
| 1.00ct | 10mm x 5mm |
| Pear Shape Diamonds | Length & Width |
|---|---|
| 0.30ct | 5mm x 3mm |
| 0.50ct | 6mm x 4mm |
| 1.00ct | 8mm x 5mm |
| Marquise Diamonds | Length & Width |
|---|---|
| 0.25ct | 5mm x 3mm |
| 0.50ct | 8mm x 4mm |
| 0.75ct | 9mm x 4.5mm |
| 1.00ct | 10mm x 5mm |
White gold or platinum?
The main advantage of white gold over platinum is that it’s much more affordable. However, the disadvantage of white gold is that you may need to recoat your jewellery in rhodium once or twice a year. This adds to its overall cost over time, whereas platinum, more expensive to start with, will never require any maintenance.
If you’d like to read more about how white gold and platinum compare, follow this link: White Gold Vs Platinum.