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>!

Need Help?

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

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.

Princess Cathedral Solitaire - Ada Diamonds

Read Our <a href="/synthetic-diamond-facts-and-misconceptions/frequently-asked-questions-about-lab-grown-diamonds">Frequently Asked Questions</a>See Our <a href="/buy-lab-diamonds">Diamond Pricing</a>

New to Lab Diamonds?

Overlay Centered

A Purchase This Important Deserves&nbsp;an <a href="/ada-vs-competition">Impeccable Buying Experience</a>

Why Choose Ada Diamonds?

Shop <a href="/wedding-bands">Wedding Bands</a> Shop <a href="/mens-wedding-bands">Men’s Bands</a>

From Will You? to _I Do_!

emerald-eternity-band-with-lab-grown-diamonds.jpg

Ada was founded by a husband-wife team. <a href="/about-ada-diamonds">Our Genesis</a> &amp; <a href="/ethical-supply-chains">Our Values</a>

Grown From Love

Founders of Ada Diamonds Sitting on a Beach at Sunset

Ready to Begin Your Concierge Experience?

Engagement Modal Form

Asscher Cathedral Solitaire

Cushion Cathedral Solitaire

Emerald Cathedral Solitaire

Oval Cathedral Solitaire

Pear Cathedral Solitaire

Radiant Cathedral Solitaire

Round Cathedral Solitaire

Princess Cathedral Pavé Setting

Lab Grown Diamonds set in White Gold Princess Cathedral Solitaire Diamond Engagement Ring (Main View)

White Gold Princess Cathedral Solitaire Diamond Engagement Ring featuring Diamonds (Profile View)

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

Lab Diamonds set in Yellow Gold Princess Cathedral Solitaire (Main View)

Lab Grown Diamonds set in Yellow Gold Princess Cathedral Solitaire (Main View)

Exceptional Quality Lab Created Diamonds Princess Cathedral Solitaire in Rose Gold (Main View)

Man Made Diamonds set in Rose Gold Princess Cathedral Solitaire Diamond Engagement Ring (Main View)

Diamonds set in Platinum & Yellow Gold Princess Cathedral Solitaire Diamond Engagement Ring (Main View)

Lab Diamonds Princess Cathedral Solitaire in Platinum & Yellow Gold (Profile View)

2.0 ct Diamonds Princess Cathedral Solitaire in Platinum & Yellow Gold (Main View)

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

Hand Selected Lab Grown Diamonds set in Platinum & Rose Gold Princess Cathedral Solitaire (Main View)

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

Diamonds Princess Cathedral Solitaire in Platinum & Rose Gold (Main View)

Platinum & Rose Gold Princess Cathedral Solitaire Diamond Engagement Ring featuring Lab Diamonds (Profile View)

platinum 2 ct princess cut man made diamond solitaire engagement ring ada diamonds design ad340 macro

Platinum Princess Cathedral Solitaire Diamond Engagement Ring featuring High Quality 2.0 Carat Lab Created Diamonds (Side View)

18k white gold princess cut cathedral high profile lab diamond solitaire engagement ring ada diamonds design ad 340 profile

1.5ct princess cut in yellow gold cathedral solitaire

1.5ct princess cut lab diamond in solitaire

lab grown princess cut diamond in platinum solitaire

High Quality 2.75 Carat Lab Diamonds Princess Cathedral Solitaire Diamond Engagement Ring in Platinum (Main View)

1.75ct princess cut lab created diamond solitaire engagement ring platinum

lab diamond yellow gold engagement ring with 1.5ct princess cut

1.75ct princess cut lab diamond in cathedral solitaire

platinum 2 carat princess cut lab diamond solitaire engagement ring ada diamonds design ad 340 on model

2.75ct lab created princess cut diamond in solitaire cathedral setting

profile view on hand of platinum 2 carat solitaire princess cut lab diamond engagement ring ada diamonds design 340

princess cathedral solitaire engagement ring with lab diamond princess eternity band ada diamonds design ad 340 on model

2.0 ctw Synthetic Diamonds set in Platinum Princess Cathedral Solitaire Diamond Engagement Ring (Main View)

2ctw Princess Cut Cathedral Solitaire Engagement Ring in Platinum

Platinum Princess Cathedral Solitaire Diamond Engagement Ring featuring 2.0 Carat Diamonds (Profile View)

2ctw Princess Cathedral Solitaire Engagement Ring in Platinum Profile View

1.5 ctw Lab Diamonds set in Yellow Gold Princess Cathedral Solitaire (Main View)

1.5ctw Princess Cut Cathedral Solitaire Engagement Ring in 14k Yellow Gold

Your Choice of Gold: $1,350 USD Platinum &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. 

Princess Cathedral Solitaire

Cathedral Solitaires

Custom made-to-order round solitaire 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.