18K Solid Gold 5.71 Ct Radiant Cut Hidden Halo Natural Diamond Engagement Ring
18K Solid Gold 5.71 Ct Radiant Cut Hidden Halo Natural Diamond Engagement Ring - Side View
18K Solid Gold 5.71 Ct Radiant Cut Hidden Halo Natural Diamond Engagement Ring - Detail
18K Solid Gold 5.71 Ct Radiant Cut Hidden Halo Natural Diamond Engagement Ring - Close Up
18K Solid Gold 5.71 Ct Radiant Cut Hidden Halo Natural Diamond Engagement Ring - Alternate Angle
18K Solid Gold 5.71 Ct Radiant Cut Hidden Halo Natural Diamond Engagement Ring - View 6
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18K · Natural

18K 5.71ct Radiant Cut Natural Diamond Solitaire Engagement Ring

$844,175
5.71ct radiant natural diamond | SI1 | 18K solid gold | GIA certified.
Total carat weight
5.71ct
Shape
Radiant
Diamond type
Natural
Color / clarity
H / SI1
Certification
GIA
Setting
Halo
Color 18K Yellow Gold
Ring Size 7

Size Guide

Your selection

Color
18K Yellow Gold
Ring Size
7
Total$844,175
  • GIA Certified
  • Free Shipping
  • 30-Day Returns
  • Free Engraving
  • 24/7 Support
  • Lifetime Warranty

FedExUPS Secure Insured worldwide shipping. Estimated delivery Nov 14 – Nov 24.

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Experience unmatched brilliance with this 18K Solid Gold 5.71 CT Radiant Cut Hidden Halo Natural Diamond Engagement Ring, a true masterpiece of elegance and grandeur.

At its heart shines a 4.90-carat GIA-certified radiant cut natural diamond, admired for its fiery sparkle and elongated facets that combine the brilliance of a round with the sophistication of an emerald cut. A delicate hidden halo of round pavé-set diamonds surrounds the center stone, adding depth, brilliance, and luxury to the design.

With a total carat weight of 5.71 carats, graded H color and SI1 clarity, this ring embodies superior craftsmanship and rare beauty. Set in 18K solid gold with a secure 4-prong and pavé setting, it is the ultimate choice for a once-in-a-lifetime engagement ring.

Product Details:

  • Metal: 18K Solid Gold
  • Diamond Type: Natural Diamond
  • Total Carat Weight: 5.71ct
  • Center Stone: Radiant Cut Diamond 4.90 Carat
  • Side Stones: Round Diamonds
  • Diamond Cut: Radiant Cut
  • Setting: 4-Prong & Pave
  • Colour: H
  • Clarity: SI1
  • Certifications: GIA Certified
  • Shipping Time: 15-22 days

Frequently Asked Questions

Can this ring be made in my size?
Yes. We make every ring to order in your preferred size, including sizes not listed on our website. Use our size guide or message us on WhatsApp if you're unsure.
What gold options are available?
Our rings are available in 14K and 18K solid gold in yellow, white, or rose gold. 18K is our signature tier; 14K offers the same designs at a more accessible price.
Is this ring made with solid gold?
Yes. All Riyanika rings are made with solid 14K or 18K gold. We do not use gold-plated, gold-filled, or vermeil.
Can I choose natural or lab-grown diamonds?
Yes. Both options are available. Natural diamonds are GIA certified; lab-grown diamonds are IGI certified. Both are chemically and optically identical — the difference is origin and price.
Can the diamond size or shape be customized?
Yes. We can adjust the carat weight and diamond shape to suit your preference. Share your requirements with us on WhatsApp before placing your order.
Is engraving available?
Yes. We offer complimentary engraving on most rings. Provide your preferred text or initials when placing your order.
Will my ring come with a diamond certificate?
Yes. Natural diamonds are certified by the Gemological Institute of America (GIA); lab-grown diamonds are certified by the International Gemological Institute (IGI). Both certificates are included with your order.
Can I see a design preview before production begins?
Yes. For customized or bespoke pieces we provide a CAD (computer-aided design) preview before production starts, so you can approve the design first.
How long does delivery take?
We offer worldwide free shipping. Orders are usually dispatched within 15–22 business days. Shipping time varies by location but generally ranges from 5–7 business days.

Need Help?

Have a question about customization, sizing, or diamonds? Chat with our jewelry specialists on WhatsApp for personalized assistance.

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Loved By Customers

Loved by repeat buyers across the world

That's why we keep coming back.
Josh, Singapore Repeat buyer
I LOVE them — so happy! I can't believe I forgot to message you.
Kate N., Singapore Repeat buyer
Love it, Pri — thank you. Looks gorgeous.
Keshwin, Singapore Diamond eternity band