4.50ct Elongated Cushion Lab Grown Diamond
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Estimated Delivery:29 Oct - 02 Nov
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Free Shipping: On all UK orders and international orders over £50
4.50ct Elongated Cushion Lab Grown Diamond – IGI Certified
Discover our 4.50ct Elongated Cushion lab grown diamonds, independently graded and certified by IGI. Available in D colour with a choice of IF, VVS1 and VVS2 clarity, each diamond is carefully selected by us for its overall appearance, brilliance and visual performance.
Diamond Specifications
- Carat Weight: 4.50ct
- Shape: Elongated Cushion
- Diamond Type: Lab Grown
- Colour: D
- Clarity: IF, VVS1 or VVS2
- Polish: Excellent
- Symmetry: Excellent
- Fluorescence: None
- Certification: IGI
- Laser Inscription: IGI report number inscribed on the girdle
Exact measurements may vary between individual diamonds.
About the Elongated Cushion Cut
The Elongated Cushion Cut combines the soft, rounded corners and brilliant-style faceting of a traditional Cushion Cut with a more elongated outline. Its extended proportions provide generous face-up coverage while retaining the brilliance and character associated with the Cushion shape, making it a popular choice for engagement rings and statement jewellery. Learn more about this shape in our Cushion Diamond Shape Guide.
Independently IGI Certified
Every diamond is independently graded by the International Gemological Institute (IGI) and supplied with its individual grading report.
The report confirms the diamond's carat weight, colour, clarity, measurements and other grading characteristics. Its unique IGI report number is laser inscribed on the diamond's girdle, allowing the stone to be matched to its certificate.
Choosing Your Clarity
Choose from VVS2, VVS1 and Internally Flawless (IF) clarity grades.
VVS2 & VVS1 offer exceptionally high clarity, with inclusions that are extremely difficult to see under 10× magnification.
IF (Internally Flawless) diamonds have no internal inclusions visible to a skilled grader at 10× magnification.
For most customers, VVS clarity already provides an exceptionally clean appearance, while IF is suited to those looking for one of the highest clarity grades available.
How Big Is a 4.50ct Elongated Cushion Diamond?
A 4.50ct Elongated Cushion lab grown diamond offers substantial face-up presence, although exact dimensions and proportions vary between individual stones.
Carat refers to a diamond's weight rather than its physical dimensions, so Elongated Cushion diamonds of the same carat weight can have different face-up measurements depending on their length-to-width ratio, depth and overall proportions.
Engagement Rings & Bespoke Jewellery
A 4.50ct Elongated Cushion diamond is an impressive choice for statement engagement rings, pendants and bespoke jewellery. Its combination of brilliant faceting, rounded corners and elongated proportions works beautifully across solitaire, halo, three-stone and custom settings.
Whether you're choosing a diamond for your own jewellery or sourcing a stone for a client commission, we're happy to help with diamond selection and suitability for your chosen setting.
Free UK Delivery & Returns
Your diamond is securely packaged and delivered with free UK delivery. We also offer 30-day free UK returns, giving you the opportunity to view your diamond before making your final decision.
United Kingdom
Royal Mail Tracked 24 - free for all UK orders up to £200
Royal Mail Special Delivery - free for orders over £200
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International
Royal Mail International Tracked & Signed — free on orders over £50, otherwise £6.99
FedEx Connect Plus — free for orders over £300
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Customs & Duties
International orders outside the UK may be subject to customs duties and import taxes upon delivery, which are the buyer's responsibility.
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Dispatch Times
Round melee dispatched within 2 business days.
Fancy melee and certified diamonds within 5 business days.
UK delivery in 1 business day from dispatch.
International delivery in 3–5 business days from dispatch.
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Returns
We’re committed to your complete satisfaction. Enjoy hassle-free returns or exchanges on all items within 30 days of delivery.
IGI Certified
Our lab grown diamonds are independently certified by IGI (International Gemological Institute), one of the world's leading authorities on lab grown diamond grading. Every diamond is accompanied by its own IGI grading report and is laser inscribed on the girdle, allowing the report to be matched to the diamond for complete confidence and authentication
Sustainably Grown
Our IGI certified lab grown diamonds are created using advanced growing technology in state-of-the-art facilities. Produced through transparent and responsible manufacturing processes, each diamond is expertly cut and polished to maximise brilliance, fire and scintillation before being independently graded by IGI for quality and accuracy
Not Sure Which Diamond Shape to Choose?
Every diamond shape has its own look, sparkle and character. From the brilliance of a Round cut to the elegance of an Oval or the vintage feel of a Cushion, the right choice comes down to personal style and how you want your diamond to look on the hand.
Our diamond shape guides make it easy to compare each cut and choose the right one with confidence.