Elongated Cushion Lab Diamond Three-Stone Engagement Ring - R1090

Name: Elongated Cushion Lab Diamond Three-Stone Engagement Ring - R1090
Brand: 18 KARATS
Price: 3150.0 USD
Availability: InStock

Price

$3,150.00

ShippingFree insured US shipping

WarrantyLifetime warranty and upgrades

SupportPersonal guidance before you order

The Elongated Cushion Three Stone Engagement Ring features a striking trio of cushion-cut diamonds, with a larger elongated cushion center stone flanked by two perfectly proportioned side stones for a balanced, harmonious look. The soft, rounded edges and brilliant facets of each cushion diamond create a warm, radiant sparkle, while the classic prong setting allows light to flow through every stone.

This ring is perfect for someone who appreciates timeless elegance with a soft, romantic feel. It pairs beautifully with a simple band or can be worn alone as a statement of classic luxury.

Details:
Band Width: 2 mm
Center Diamond Shape: Elongated Cushion
Accent Diamond Shape: Cushion
Number of Accent Diamonds: 2
Accent Diamond Total Carat Weight: ~ 1.0 ctw
Setting: Claw Prong

Lab Diamond
Diamond Color: E
Diamond Clarity: VS
IGI Certified

This design can be modified to your preferences, including side stones, metal width, and other small details. Contact our team to place a special order!

Cushion - Cut Diamond Three Stone Engagement Ring - R1090 in Ring by 18 KARATS INC.

18 KARATS Promise

Every purchase from 18 KARATS comes with our quality guarantee. We offer a lifetime warranty on every item, with convenient resizing, returns, and customization options.

Lifetime Upgrades and Warranty

Lifetime warranty on defects and lifetime upgrades with only the difference in price.

14 Day Money Back Guarantee

If you're not completely satisfied, return your piece within 14 days for a full refund.

60 Days Unlimited Resizing

Need a different size? Enjoy complimentary resizing for 60 days to ensure the perfect fit.

Free Shipping and Returns

We offer free domestic shipping and returns for a worry-free experience.

Precision and Quality

We use microscopes to set all diamonds for maximum accuracy and quality.

Customized For You

Modify any existing design or create a one-of-a-kind piece with us made just for you.

Any Metal and Style

Customize This Product

Customize your piece in any metal, any color, any style, and any size. Want to combine two of our existing designs into one? Or alter one of our jewelry pieces to make it uniquely yours? We’ll make it happen. Once you share your ideas, we’ll send you a custom 3D rendering so you can see exactly how your piece will look before it’s made. Need changes? We’ll revise it until it’s perfect.

Custom Jewelry

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from 10 reviews

Just got my shiniest ring from 18 KARATS with the best quality brilliant with an excellent and professional setting, no words! Just better the best 😍

Milena Bedevyan

08/05/2026

f I had to give a rating, it would be 11 out of 10. The pieces are beautiful and flawlessly crafted. The company is highly professional and truly respects and understands the customers. The prices are fair, and you won't find this level of quality at a lower price anywhere else. I am very satisfied and happy with my choice.

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I needed a special design for my engagement ring and Gohar helped me to get my dream ring. I’m very satisfied, the quality was perfect and it took just 10 days to get the ring. I would 100% recommend them to everyone.

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Absolutely in love with this necklace for my little niece! 💕 The quality is beautiful, the pendant looks so delicate and elegant, and everything feels very well made. Shipping was fast, packaging was lovely, and it looks even prettier in real life. Such a perfect little gift — highly recommend! ✨

Наталья Илуца

05/27/2026

I’m so happy with my ring from 18Karats. It’s even more beautiful in person and sparkles so nicely. The design is elegant, the quality feels amazing, and the box was beautiful too. Such a great experience overall!

Lilit Tiratsyan

05/19/2026

I have been purchasing jewelry from this company for a very long time! They have some of the most amazing diamonds at the best prices (including custom pieces). The pieces are made to last a lifetime and they also have helpful customer service!!! Highly recommend 👍🏻 I am a repeat customer for life!

Greta Gasparian

03/18/2026

I recently got this ring from 18 Karats. The ring is absolutely stunning , and I’ve already received so many compliments on my new ring.  I highly recomend to anyone who is looking for good quality jewelry. The packaging also was very elegant and I was so impressed!

Kristina Avetisyan

02/06/2026

I had a great experience with this jeweler. The ring is beautiful and very good quality. It looks even better in person and shines so nicely. The prices are honestly unmatched for the quality you get. You can really tell they care about their work. I’m very happy with my purchase and definitely recommend

Evleen Davoudian

02/02/2026

Had an amazing experience ordering my dream ring through 18Karats. It was a custom order, which they accommodated without any problems. They explained what options I had, what kind of settings would fit my idea and what type of diamonds to choose from. The ring came out perfectly and just as we discussed (and in the matter of few days). I can’t recommend them enough!!

Gohar Sukiasyan

01/21/2026

Elongated Cushion Lab Diamond Three-Stone Engagement Ring - R1090