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A US-based lab diamond expert will respond within 1 business day.&nbsp;

May We Help You?

A Diamond Concierge is available to help you choose the best option.

A sample of our hand-selected, pre-vetted, in-house inventory, immediately available for sale. Want to see more options? <a href="/inquire">Inquire</a> now for a curated list.&nbsp;

Our friendly Diamond Concierge Team is available to answer any questions you may have, help you choose a spectacular lab diamond, and customize this engagement ring to your exact specifications.

ER PDP Checkout Fine Print

Complimentary engraving up to 10 characters. Longer engravings or those with special characters may be available for an extra charge upon inquiry. Please note, resizing engraved rings may require an additional fee.

Not sure what size halo is best? <a href="/inquire">Please inquire</a> and a Diamond Concierge will be happy to discuss with you.

Always custom created, never mass-produced. We proudly craft all of our engagement rings in the USA.

Thank You for Your Inquiry! 

An Ada Diamonds concierge will contact you via email shortly. You can expect a response within 1-2 business days of your submission. We look forward to working with you.In the meantime, please follow <a target="_blank" rel="noopener noreferrer" href="https://instagram.com/adadiamonds">@AdaDiamonds</a>!

Global PopUp Form

Visit <a href="/visit">one of our showrooms</a> or join the thousands of clients around the world who work with us <a href="/diamond-concierge-process">entirely virtually</a>.

After checkout, a Concierge will contact you via email to confirm your order. Prior to production, you will receive a rendering of your ring's exact dimensions for your approval. If you are unresponsive, your order may be canceled.Have questions? Not ready to checkout? <a href="/inquire">Inquire</a> now and a Concierge will respond within 1 business day.&nbsp;

Setting Price as Currently Configured

PDP ER - Setting Price as Currently Configured

Return Policy

We expect you to love your Ada jewelry. Should you be unhappy for any reason, return your item within 30 days for a full refund, less any non-refundable deposits or re-stocking fees. Jewelry must be in new, unworn condition and customer is responsible for return shipping. A return shipping label will be provided for a small fee.

Free US Shipping fully insured with signature required to a residence, business address, or Fedex Office. Purchases over $15,000 will ship FedEx Priority Overnight. Purchases of less than $15,000 will ship Fedex Two Day. International Shipping to 69 countries, fully insured. International shipping fees start at $75 USD.

When it comes to durability and having an engagement ring that stands the test of time, platinum is our recommended choice for a white metal.

2.0 Carat Lab Created Diamonds set in Yellow Gold Cushion Cathedral Solitaire Diamond Engagement Ring (Main View)

Exceptional Quality 2.0 ct Lab Grown Diamonds set in Yellow Gold Cushion Cathedral Solitaire (Main View)

Not sure what she wants? We can help. Propose with a classic solitaire, and then design a custom ring together.

Proposal Settings

Floral Basket Solitaire Diamond Engagement Ring featuring Man Made Diamonds (Profile View)

Floral Basket Solitaire featuring Diamonds (Profile View)

See why real couples chose Ada to tell their love story

They Said Yes! 

At Ada Diamonds, we’re different,&nbsp;we’re better, we’re worth it. Book your complimentary consultation now

The Most Trusted Experts in Lab Diamonds

Diamonds set in Pear Petite Pavé Setting (Profile View)

Pear Petite Pavé Diamond Engagement Ring featuring High Quality Lab Diamonds (Profile View)

Ready to Begin Your Concierge Experience?

Engagement Modal Form

Asscher Cathedral Solitaire

Emerald Cathedral Solitaire

Oval Cathedral Solitaire

Pear Cathedral Solitaire

Princess Cathedral Solitaire

Radiant Cathedral Solitaire

Round Cathedral Solitaire

Cushion Cathedral Pavé Setting

Diamonds Cushion Cathedral Solitaire in White Gold (Main View)

White Gold Cushion Cathedral Solitaire featuring Diamonds (Profile View)

Diamonds Cushion Cathedral Solitaire in White Gold (Profile View)

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

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

Exceptional Quality Diamonds set in Yellow Gold Cushion Cathedral Solitaire Diamond Engagement Ring (Main View)

Hand Selected Diamonds set in Yellow Gold Cushion Cathedral Solitaire Diamond Engagement Ring (Main View)

Diamonds set in Yellow Gold Cushion Cathedral Solitaire Diamond Engagement Ring (Main View)

Hand Selected Diamonds Cushion Cathedral Solitaire in Yellow Gold (Main View)

Lab Diamonds set in Rose Gold Cushion Cathedral Solitaire Diamond Engagement Ring (Main View)

Rose Gold Cushion Cathedral Solitaire Diamond Engagement Ring featuring Lab Diamonds (Main View)

Created Diamonds Cushion Cathedral Solitaire Diamond Engagement Ring in Rose Gold (Main View)

Diamonds Cushion Cathedral Solitaire in Rose Gold (Main View)

Platinum & Yellow Gold Cushion Cathedral Solitaire Diamond Engagement Ring featuring Diamonds (Main View)

High Quality Synthetic Diamonds set in Platinum & Yellow Gold Cushion Cathedral Solitaire Diamond Engagement Ring (Main View)

Lab Diamonds Cushion Cathedral Solitaire Diamond Engagement Ring in Platinum & Yellow Gold (Profile View)

Synthetic Diamonds Cushion Cathedral Solitaire Diamond Engagement Ring in Platinum & Yellow Gold (Profile View)

Platinum & Yellow Gold Cushion Cathedral Solitaire Diamond Engagement Ring featuring Exceptional Quality Lab Diamonds (Profile View)

High Quality Lab Diamonds Cushion Cathedral Solitaire in Platinum & Yellow Gold (Profile View)

Exceptional Quality Synthetic Diamonds set in Platinum & Rose Gold Cushion Cathedral Solitaire (Main View)

Man Made Diamonds set in Platinum & Rose Gold Cushion Cathedral Solitaire (Main View)

Diamonds set in Platinum & Rose Gold Cushion Cathedral Solitaire Diamond Engagement Ring (Profile View)

Platinum & Rose Gold Cushion Cathedral Solitaire featuring Hand Selected Lab Grown Diamonds (Profile View)

Platinum & Rose Gold Cushion Cathedral Solitaire Diamond Engagement Ring featuring Synthetic Diamonds (Main View)

Hand Selected Man Made Diamonds set in Platinum & Rose Gold Cushion Cathedral Solitaire (Main View)

Diamonds set in Platinum & Rose Gold Cushion Cathedral Solitaire (Profile View)

Diamonds Cushion Cathedral Solitaire Diamond Engagement Ring in Platinum & Rose Gold (Profile View)

cushion cut lab diamond engagement ring solitaire

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

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

white gold cathedral solitaire with cushion cut

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

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

Cushion Cathedral Solitaire featuring Lab Diamonds (Side View)

Platinum & Yellow Gold Cushion Cathedral Solitaire Diamond Engagement Ring featuring Exceptional Quality 2.0 ct Diamonds (Profile View)

14k yellow godl 3 carat cushion cut solitaire engagement ring high profile with lab diamond ada diamonds design ad 334

2.0 Carat Lab Grown Diamonds set in Platinum & 14 Karat Yellow Gold Cushion Cathedral Solitaire (Profile View)

14k yellow gold Cushion Cathedral Lab Diamond Solitaire Engagement Ring Ada Diamonds Design AD-334 Artistic

14k yellow gold 3 carat cushion cathedral man made diamond solitaire engagement ring ada diamonds design ad 334

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Cushion Cathedral Solitaire Diamond Engagement Ring featuring Created Diamonds

"Discover the Elegance: 2.0ct Cushion Cathedral Solitaire Diamond Engagement Ring in 18k White Gold | AD-334"

Cushion Cathedral Solitaire Diamond Engagement Ring featuring Lab Diamonds

"Unveiling the 2.0ct Cushion Cathedral Solitaire Engagement Ring in 18k White Gold | Lab Diamonds Showcase"

Cushion Cathedral Solitaire featuring Diamonds

"3.0ct Cushion Cathedral Solitaire Diamond Engagement Ring in 14k Yellow Gold - Unveiling"

Cushion Cathedral Solitaire Diamond Engagement Ring featuring Hand Selected Diamonds

2.5 ct Lab-Created Diamond: Radiant Halo Pavé Engagement Ring in Platinum - AD-445

Your Choice of Gold: $1,350 USDPlatinum &amp; Two-Tone: $1,600 USD Pricing is for setting only - center stone priced separately. Add a hidden halo for $500 USD.

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.

Cushion Cathedral Solitaire

Cathedral Solitaires

Custom made-to-order solitaire engagement ring featuring conflict-free lab diamonds hand-selected for quality, fire, and brilliance. Available options: platinum, 14k or 18k gold: white, yellow, rose. Ada Diamonds is the leading luxury purveyor and the best place to buy a lab diamond. Virtual consultations available worldwide; private in-person appointments available in New York and Austin TX.