If you're dreaming of a ring with soft curves, vintage charm, and radiant sparkle, our cushion-cut lab diamond engagement rings are made for you. Each ring is handcrafted in 100% solid 14K & 18K gold and set with an ethically sourced, IGI-certified lab-grown diamond, giving you timeless beauty with a modern, sustainable twist.

All rings are hypoallergenic, artisan-made, and shipped free across the UK, arriving with full certification and tamper-proof packaging. At The Karat Store, you’ll find fine jewellery that honours your love—elegantly and ethically.

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    History, Types, Cultural Significance Of Cushion Cut Lab Diamond Engagement Ring

    The cushion cut diamond—often described as a cross between a round and a princess cut—features a pillow-like shape with rounded corners and brilliant facets. Its vintage roots date back to the 19th century, but its popularity remains strong today thanks to its warm, romantic glow and timeless appeal.

    Our cushion-cut lab diamond rings are available in a range of gorgeous styles:

    • Classic solitaires in 4-prong or bezel settings

    • Halo and double halo rings for added sparkle

    • Three-stone designs with complementary side stones

    • Hidden halos, twisted bands, and split-shank styles

    • Customizable options in white, yellow, and rose gold

    Loved by UK shoppers for their soft elegance and versatile style, cushion-cut diamonds offer the perfect blend of tradition and modern-day ethics, especially when grown sustainably in a lab.

    Quality of Material Used

    Every ring is made with 100% solid 14K & 18K gold—never plated or filled—for a luxurious feel and long-lasting quality. Choose the gold tone that suits your love story best: classic yellow, modern white, or romantic rose.

    Our lab-grown diamonds are carefully chosen for brilliance, cut, and clarity. And because we use only nickel-free, hypoallergenic materials, your ring will be as comfortable as it is beautiful, made for everyday wear.

    Certifications Provided

    Each cushion-cut engagement ring includes:

    • An IGI certificate confirming cut, clarity, carat, and origin

    • A 14K & 18K gold purity stamp

    • A detailed invoice and full product documentation

    With certified lab-grown diamond jewellery, you can shop confidently, knowing your investment is backed by transparency and excellence.

    Craftsmanship

    Your engagement ring isn’t just a symbol—it’s a work of art. That’s why every ring is handcrafted by skilled artisans, with careful attention to proportion, polish, and setting security.

    Before we ship, each piece is put through a multi-step inspection to ensure it meets our highest standards of quality and beauty. The result? A cushion-cut ring that shines with lasting love.

    Frequently Asked Questions

    1. How long does shipping take to the UK?
    Shipping takes 12 to 22 days to your doorstep in the UK.

    2. Are the diamonds and gold real?
    Yes! We use IGI-certified lab-grown diamonds and 100% solid 14K & 18K gold—never plated or synthetic.

    3. What makes cushion cut diamonds unique?
    Their rounded corners and brilliant facets offer a romantic, soft sparkle—perfect for vintage and modern designs alike.

    4. Will my ring come with certification?
    Yes. Every ring includes an IGI certificate, gold purity stamp, and a detailed invoice.

    5. Can I return my ring if needed?
    We accept returns only if the item is damaged or if the wrong product is delivered.

    6. Is shipping free within the UK?
    Yes, we provide free shipping across all 50 UK states.

    7. Will I receive tracking details?
    Absolutely. A tracking number will be sent as soon as your order ships.

    8. Can I customize my cushion cut ring?
    Yes! We accept custom orders—just email us with your design preferences.

    9. Are the rings hypoallergenic?
    Yes. All rings are nickel-free and hypoallergenic, perfect for sensitive skin.

    10. How do I contact The Karat Store for support or questions?
    You can email us anytime at contact@thekaratstore.uk—we’re here to help with anything you need.