18K 3.5ct Cushion Cut Lab Grown Diamond Side Stone Engagement Ring
SKU: LBSH0282-18L
Also available in 14K
FedEx UPS Secure Insured worldwide shipping. Estimated delivery Sep 30 – Oct 10.
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Make your proposal unforgettable with this breathtaking 18K Solid Gold 3.50 CT Lab Grown Diamond Cushion Cut Double Halo Engagement Ring. At the heart of this masterpiece lies a 2.5 CT cushion-cut Lab Grown diamond, measuring 7.50 mm, known for its fire, brilliance, and elegant shape. Surrounding the center stone is a double halo of round brilliant cut diamonds with a total weight of 1.00 CT, enhancing its radiance and making the center diamond appear even larger.
Each diamond is graded E color and VS1 clarity, ensuring a dazzling white brilliance with exceptional purity. The double halo design, combined with the shimmering band of prong-set round diamonds, creates an extraordinary sparkle from every angle.
Crafted in 18K solid gold, this ring represents both luxury and authenticity. All Lab Grown diamonds are IGI certified, providing assurance of superior quality. A true statement of love and sophistication, this engagement ring is perfect for a proposal or as a timeless heirloom piece.
Details:
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Metal: 18K Solid Gold
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Diamond Type: Lab Grown Diamonds
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Total Carat Weight: 3.50 CT
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Centre Stone: Cushion Cut, 2.5 CT (Approx.), 7.50 mm
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Side Stones: Round Brilliant Cut, 1.00 TCW (Approx.), 1.3-1.5 mm each
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Color Grade: E
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Clarity: VS1
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Setting: Double Halo with Prong Set Diamonds
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Shipping Time: 15-22 days
Shipping Information
We offer free shipping across the World on all orders—no minimum required.
- Processing & Handling: 5–10 business days
- Shipping Time: 10–15 business days
- Total Delivery Time: 15–25 business days from the date of order
- Carriers: USPS & UPS
Please inspect your package upon delivery for any damage or tampering before signing.
For assistance, contact us at contact@riyanikajewels.com
At Riyanika Jewels, every piece is crafted in solid gold — 18K as our signature, with 14K available across our full catalogue for customers who want a more accessible entry price or everyday-wear durability. Every design ships with certifications that verify the authenticity and quality of both the metal and the stones.
Gold Certification
Every Riyanika piece is solid gold, with the official government-recognized certification that guarantees purity and authenticity — 75% pure gold for 18K, 58.5% pure gold for 14K. Same transparency either way.
Lab-Grown Diamond Jewelry
Our lab-grown diamond jewelry is certified by the International Gemological Institute (IGI). Each certificate verifies the diamond's authenticity, along with detailed grading of cut, clarity, color, and carat weight—ensuring you receive a diamond of the highest standard.
Natural Diamond Jewelry
All natural diamond solitaires and center stones are graded by the Gemological Institute of America (GIA), the world's most trusted authority in diamond grading. Each purchase includes the corresponding GIA certificate.
Gemstone Jewelry
Every gemstone piece is accompanied by a detailed Gemologist Report, offering an in-depth analysis of the stone's unique characteristics.
Optional Certification: Customers may request IGI or GIA certification on any piece. This service requires an additional fee and may take 30–40 days for processing.
At Riyanika Jewels, every piece is crafted in solid gold — 18K as our signature, or 14K for those who prioritize everyday durability — and set with Natural or Lab-Grown Diamonds. The care guidance below is the same whichever karat you choose.
1. Clean Regularly
Gently clean your jewelry using a mild soap and lukewarm water solution. Use a soft brush to remove dirt, rinse thoroughly, and dry with a soft lint-free cloth.
2. Store Safely
Keep your jewelry in a dry place, ideally in a jewelry box or soft pouch. Store pieces separately to prevent scratches and tangling.
3. Avoid Harsh Chemicals
Remove your jewelry before swimming, bathing, or using cleaning products. Chemicals such as chlorine and detergents can damage both gold and diamonds.
4. Handle with Care
Avoid wearing your jewelry during strenuous activities like exercising, gardening, or heavy lifting. This prevents accidental knocks, scratches, or loosening of stones.
5. Inspect Periodically
Check your jewelry regularly for loose stones or worn settings. If you notice any issues, contact us immediately for professional repair and maintenance.
By following these tips, your Riyanika Solid Gold Natural or Lab-Grown Diamond Jewelry will remain stunning for years to come.
For any questions or assistance, feel free to reach out to us at contact@riyanikajewels.com.
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?
- Delivery typically takes 15–22 business days from the date of order. All orders ship free and fully insured with tracking via FedEx or UPS.
Need Help?
Have a question about customization, sizing, or diamonds? Chat with our jewelry specialists on WhatsApp for personalized assistance.
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I LOVE them — so happy! I can't believe I forgot to message you.
Love it, Pri — thank you. Looks gorgeous.