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The Cosima

$1,663
10K
Yellow Gold
10K
White Gold
10K
Rose Gold
14K
Yellow Gold
14K
White Gold
14K
Rose Gold
18K
Yellow Gold
18K
White Gold
18K
Rose Gold
PT
Platinum
Add EngravingYour personal touch

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Pay in 12 interest-free installments of $138.58 Learn more
Setting

Know your setting

Width2.00 MM

Measured at the base of the ring

Carat Weight
Center Stone Ct10.08 CT
Side Stone TCW0.25 CT

Center stone & side stones carat weight

Metal18k Rose Gold
75% Gold
21.8% Copper
2.2% Silver
0.8% Zinc

The secret sauce that makes this piece.

Profilehigh
high profile

Sits flush with a straight wedding band

Accent Gems
EFColor
VSClarity

Side stones average color & clarity

The Cosima

An oval cut lab grown diamond sits at the center of this engagement ring, held by four prongs. A hidden row of round diamonds rests beneath the crown, visible from a side angle for added brilliance without changing the stone’s clean look from above. The polished, plain band keeps the focus entirely on the center stone while offering comfortable, everyday wear and easy resizing. Available in 10K, 14K or 18K yellow, white or rose gold, or platinum. Diamonds are colorless, VS clarity, lab grown.

Details
Material
18k Rose Gold
Center Stone Shape
Oval
Width
2 mm
Profile
High
Style
Hidden Halo, Solitaire, Pave
SKU
ER00030
Cut
Oval
Carat
10.08 CT
Side Stones
Approx. Carat Weight
0.25 CT
Average Color
EF
Average Clarity
VS
Origin
Lab Diamond

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In-Person

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Book a personalized consultation with one of our jewelry experts in our showroom or in a one-on-one online session.

Book Appointment

Customer Reviews

Exquisite Quality & Craftsmanship

The ring exceeded all my expectations! The shine and setting details are breathtaking.

J

Jash Patel

Jun 8, 2026

Verified

Stunning Design

Absolutely in love with the kite diamond ring! Customer service was top notch and answered all my questions.

E

Emily R.

Aug 14, 2026

Verified

She Said Yes!

The sparkle on this diamond is incredible. Arrived right on time in gorgeous packaging. Highly recommend!

M

Michael T.

Jul 22, 2026

Verified

Perfect Engagement Ring

Every single person compliments my ring! The band is so comfortable and the stone is flawless.

S

Sarah L.

Aug 02, 2026

Verified

Exquisite Quality & Craftsmanship

The ring exceeded all my expectations! The shine and setting details are breathtaking.

J

Jash Patel

Jun 8, 2026

Verified

Stunning Design

Absolutely in love with the kite diamond ring! Customer service was top notch and answered all my questions.

E

Emily R.

Aug 14, 2026

Verified

She Said Yes!

The sparkle on this diamond is incredible. Arrived right on time in gorgeous packaging. Highly recommend!

M

Michael T.

Jul 22, 2026

Verified

Perfect Engagement Ring

Every single person compliments my ring! The band is so comfortable and the stone is flawless.

S

Sarah L.

Aug 02, 2026

Verified

Exquisite Quality & Craftsmanship

The ring exceeded all my expectations! The shine and setting details are breathtaking.

J

Jash Patel

Jun 8, 2026

Verified

Stunning Design

Absolutely in love with the kite diamond ring! Customer service was top notch and answered all my questions.

E

Emily R.

Aug 14, 2026

Verified

She Said Yes!

The sparkle on this diamond is incredible. Arrived right on time in gorgeous packaging. Highly recommend!

M

Michael T.

Jul 22, 2026

Verified

Perfect Engagement Ring

Every single person compliments my ring! The band is so comfortable and the stone is flawless.

S

Sarah L.

Aug 02, 2026

Verified

Our Couples

Lucas & Charlotte

I always dreamed of visiting Paris, but I never imagined it would become one of the most important days of my life. After a beautiful evening exploring the city, we headed to dinner with a perfect view of the Eiffel Tower glowing in the distance. I thought we were simply celebrating our trip. Instead, he was planning to change our lives forever. As the lights sparkled across the city, he reached for my hand and told me how much our journey together meant to him. Before I could process what was happening, he asked me the question I'd been dreaming about. And of course, I said yes. The rest of the night felt like a movie. We laughed, cried, took endless photos, and celebrated under the Paris skyline. Looking back, I still can't believe that my favorite city became the place where our forever began.

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Henry & Grace

As the sun began to set, the couple stood close together, enjoying a quiet moment. He gently held her hands, looked into her eyes, and said, “You have made my life more beautiful than I ever imagined. I want to wake up beside you, share my dreams with you, and hold your hand through every challenge. Will you marry me?” She smiled with tears of happiness in her eyes. Then, to his surprise, she took a small ring box from her pocket. “I was planning to ask you the same question,” she whispered. “Because I don't just want you to choose me. I want to choose you, every single day, for the rest of my life.” He laughed with joy and said, “Yes, a thousand times, yes!” They exchanged rings, embraced each other, and shared a gentle kiss beneath the golden sky. In that beautiful moment, they realized that true love isn't about who proposes first, but about two hearts choosing the same forever. ❤️

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Lily & James

I had imagined proposing to her a hundred different ways, but when the moment finally came, none of those plans mattered. We were out on the water, watching the sun slowly disappear into the ocean. She was laughing at something silly I had said, completely unaware that my heart was racing and that I had a little ring box hidden away. I held her close, looked at her, and thought about all the little things that had made me fall in love with her. The way she laughs, the way she makes ordinary days feel special, and how being with her feels like home. I took a deep breath and pulled out the ring. Before I could even get the words out, she covered her mouth, smiling and laughing through her surprise. And then, somehow, she surprised me right back. She had a ring for me, too. Turns out, we had both been planning to ask the same question. I slipped the ring onto her finger, and she did the same for me. We laughed, hugged, and held each other a little tighter as the sun set behind us. I thought I was going to ask her to be mine forever. Instead, I discovered that she had already been dreaming of the same forever. I went out there with a ring and a question. I came back with a fiancée, a memory I'll never forget, and the most beautiful kind of certainty: we were choosing each other.

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John & Ashley

We woke up early to catch the sunrise together, something we had always loved doing whenever we traveled. The beach was quiet, the air was warm, and everything felt peaceful. At one point, he asked me to come stand by the water so we could take a photo. Instead of posing for the camera, I wrapped my arms around him and rested my head on his shoulder. That's when he whispered, There's something I've been waiting to ask you. I pulled back and instantly saw the smile on his face. A few moments later, he was holding the most beautiful ring I had ever seen. I couldn't stop laughing and crying at the same time as I said yes. The ocean, the sunrise, and that perfect moment felt like something straight out of a dream. Even now, every time I look at my ring, I remember exactly how I felt standing there with him

Read More→

James & Emily

Our Forever Begins Here. It started with a simple smile, a little laughter, and a love that slowly became my favorite part of life. On a beautiful evening by the ocean, with the golden sun setting behind us and the waves whispering their own love story, we found ourselves wrapped in a moment we wished would never end. He held me close, I laughed with all my heart, and for a moment, the whole world seemed to disappear. It was just us, our dreams, and the beautiful future waiting ahead. And now, our forever has a beginning. Two hearts, one promise, and a lifetime of choosing each other. From this sunset to every sunrise that follows — it's always going to be you and me.

Read More→