Engagement Rings

Diamonds Cushion Cathedral Solitaire in White Gold (Main View)

Shown with 2ct in 18k White Gold

Diamonds set in White Gold Cushion Cathedral Solitaire Diamond Engagement Ring (Side View)

Shown with 2ct in 18k White Gold

White Gold Cushion Cathedral Solitaire Diamond Engagement Ring featuring Lab Diamonds (Side View)

Shown with 2ct in 18k White Gold

cushion cut lab diamond engagement ring solitaire

Shown with 2ct in 18k White Gold

Platinum Cushion Cathedral Solitaire featuring Hand Selected 1.25 ct Lab Diamonds (Main View)

Shown with 1.25ct in Platinum

14k yellow gold 3 ct cushion cut lab diamond solitaire engagement ring ada diamonds design ad 334

Shown with 3ct in 14k Yellow Gold

Cushion Cathedral Solitaire Diamond Engagement Ring featuring High Quality Man Made Diamonds

Shown with 1.5ct in 14k Yellow Gold

Cushion Cathedral Solitaire featuring Lab Diamonds (Side View)

Shown with 1.5ct in 14k Yellow Gold

Shown with 1.75ct in Platinum & Yellow Gold

Shown with 3ct in 14k Yellow Gold

14k Yellow Gold 2ct Cushion Cut Cathedral Lab Diamond Solitaire Engagement Ring Ada Diamonds Design AD-334 with Wedding Band

Shown with 2.25ct in 14k Yellow Gold

Platinum Cushion Cathedral Lab Diamond Solitaire Engagement Ring Ada Diamonds Design AD-334 Artistic

Shown with 2ct in Platinum & 14k Yellow Gold

Platinum 3.5ct Cushion Cut Lab Diamond Solitaire Engagement Ring Ada Diamonds Design AD-334 Macro

Shown with 3.5ct in Platinum

Platinum 2ct Cushion Cut Cathedral Solitaire Engagement Ring Ada Diamonds Design AD-334 Macro

Shown with 2ct in Platinum

Yellow Gold 1 Carat Cushion Cut Lab Diamond Cathedral Solitaire Engagement Ring Ada Diamonds Design AD-334 on Model

Shown with 1ct in 18k Yellow Gold

1-25ct-cushion-cut-in-solitaire-engagement-ring_1646514080670-KB09ZSBBX3HR8IV2DMK1

Shown with 1.25ct in Platinum

yellow gold 1.5 carat cushion cut lab diamond solitaire engagement ring design ad 334

Shown with 3ct in 14k Yellow Gold

2.0 ctw Diamonds set in Platinum & Yellow Gold Cushion Cathedral Solitaire (Main View)

Shown with 1.75ct in Platinum & Yellow Gold

18k White Gold 2ct Cushion Cut Lab Diamond Ring Ada Diamonds Design AD-334 on Hand

Shown with 2ct in 18k Platinum

Yellow Gold 2.5 Carat Cushion Cathedral Solitaire Lab Diamond Ring Ada Diamonds Design AD-334 on Model

Shown with 2.25ct in 14k Yellow Gold

14k yellow gold 3ct cushion cut cathderal lab diamond solitaire engagement ring ada diamonds design ad 334 on model

Shown with 3ct in 18k Yellow Gold

Platinum 3.5 Carat Cushion Cathedral Solitaire Lab Diamond Ring Ada Diamonds Design AD-334 on Model

Shown with 3.5ct in Platinum

Platinum Cushion Cathedral Solitaire featuring 1.25 ctw Synthetic Diamonds (Side View)

Shown with 1.25ct in Platinum

Shown with 2ct in 18k White Gold

Shown with 3ct in 14k Yellow Gold

Shown with 3.25ct in Platinum & 14k Yellow Gold

1 / 31

Solitaires

Cushion Cathedral Solitaire

Starting at $1,350 (Setting Only)

Simply classic, this setting features petite prongs and raised catherdal shoulders. Customize your lab diamond solitaire engagement ring with band widths of 1.8-2.5mm.

Solitaires

Starting at $1,350 (Setting Only)

Simply classic, this setting features petite prongs and raised catherdal shoulders. Customize your lab diamond solitaire engagement ring with band widths of 1.8-2.5mm.

Selection Options

Ships in 2-3 Weeks

The Ada Diamonds Difference

Personal Concierge

Your own jeweler to guide you from the first question to the finished piece.

Made to Order in NYC

Individually crafted in our New York Flagship.

Lifetime Trade-Ins

We believe in every diamond we choose, and we’ll take it back, forever.

30-Day Returns

Peace of mind, built in.

Personal Concierge

Your own jeweler to guide you from the first question to the finished piece.

Made to Order in NYC

Individually crafted in our New York Flagship.

Lifetime Trade-Ins

We believe in every diamond we choose, and we’ll take it back, forever.

30-Day Returns

Peace of mind, built in.

Reviews

“Ada Diamonds lives up to its reputation of only providing high quality lab grown diamonds. The diamond that I ended up choosing was perfect! The ring is also top-notched for the design and craftsmanship. My fiance and I could not be happier with the finished product!”

— Chanh P.

“Ada Diamonds turned a complicated purchase into the simplest process, and they are worth every penny. My aunt used to be in the jeweler business and this ring got her seal of approval for quality craftsmanship. Love it!”

— Erin V.

“Incredible experience working with Ada Diamonds. Fantastic client service, from the initial video consultation to the constant responsiveness. In addition to the service, the ring is absolutely beautiful. I can't recommend Ada enough.”

— Ian H.

“I couldn't be happier with my overall exceptional experience I had with Ada Diamonds. I really appreciate the quality craftsmanship of the ring itself, and the conflict-free, ethical diamonds.”

— Mark C.

“We had a fantastic experience with Ada! My Concierge was so helpful in finding the perfect engagement ring for us. I would absolutely recommend Ada to anyone!”

— Matt E.

“The ring was perfect. It looks just a great as anything you'd buy at Tiffany's with the piece of mind about its origins. I'd highly recommend Ada to anyone looking.”

— Josh R.

“I recently bought my fiancee's ring at Ada and it was an awesome experience. I highly recommend visiting Ada and checking out what they have to offer!”

— Colin J.

“Ada was friendly, respectful and so encouraging. I cannot speak highly enough to their customer experience, and most importantly, the quality of their diamonds and rings! Their warranty speaks for itself.”

— Taylor G.

“If you're looking for high quality lab grown diamonds, work with Ada, they will make sure you get what you want, you'll have full control over customization of your ring, and they only sell amazing diamonds!”

— Paul P.

“The ring came out absolutely stunning and was exactly what my fiancé wanted per the specs she had provided. I would highly highly recommend Ada diamonds to anybody.”

— Evan G.

“Ada Diamonds lives up to its reputation of only providing high quality lab grown diamonds. The diamond that I ended up choosing was perfect! The ring is also top-notched for the design and craftsmanship. My fiance and I could not be happier with the finished product!”

— Chanh P.