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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.

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

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.

Open Tapered 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_!

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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

Ada Diamonds specializes in large, sensational diamonds of superlative quality. Our diamonds are cut from the highest purity diamond crystals, have optimal cut and sparkle, and are always eye clean. Much like mined diamonds, lab diamonds are priced based on their quality characteristics. Use the tool below to understand our pricing:

Ada Diamonds is the Leading Luxury Purveyor of Lab Diamonds

Lab Diamonds set in White Gold Open Tapered Cathedral Solitaire (Main View)

Diamonds Open Tapered Cathedral Solitaire in White Gold (Profile View)

Lab Diamonds set in White Gold Open Tapered Cathedral Solitaire Diamond Engagement Ring (Side View)

Lab Created Diamonds Open Tapered Cathedral Solitaire Diamond Engagement Ring in Yellow Gold (Main View)

Yellow Gold Open Tapered Cathedral Solitaire featuring High Quality Lab Diamonds (Main View)

High Quality Synthetic Diamonds set in Rose Gold Open Tapered Cathedral Solitaire Diamond Engagement Ring (Main View)

Rose Gold Open Tapered Cathedral Solitaire Diamond Engagement Ring featuring Diamonds (Main View)

Hand Selected 2.0 Carat Lab Grown Diamonds set in Platinum Open Tapered Cathedral Solitaire (Main View)

Exceptional Quality 2.0 ct Lab Diamonds Open Tapered Cathedral Solitaire in Platinum (Profile View)

Platinum 1.5 Carat Cushion Cut Open Cathedral Solitaire Lab Diamond Engagement Ring with Tapered Band Ada Diamonds Design Number AD-147 Macro Shot

platinum cushion cut 2.5ct lab diamond cathedral solitaire engagement ring with tapered band ada diamonds design ad 147 profile

18k white gold 2.5ct cushion cut solitaire with tapered band and open basket ada diamonds design ad 147 macro

18k Yellow Gold Open Tapered Cathedral Solitaire Diamond Engagement Ring featuring 1.25 Carat Lab Diamonds (Main View)

Hand Selected 1.25 Carat Man Made Diamonds set in 18kt Yellow Gold Open Tapered Cathedral Solitaire Diamond Engagement Ring (Profile View)

Two and a Half Carat Open Cathedral Lab Diamond Solitaire Engagement Ring in Platinum Ada Diamonds Design AD-147

Two and a Half Carat Open Cathedral Lab Diamond Solitaire Engagement Ring in Platinum Profile View Ada Diamonds Design AD-147

Platinum Open Tapered Cathedral Solitaire featuring 1.75 Carat Diamonds (Main View)

1.5 Carat Lab Diamonds set in 18k Yellow Gold Open Tapered Cathedral Solitaire Diamond Engagement Ring (Main View)

14kt Rose Gold Open Tapered Cathedral Solitaire Diamond Engagement Ring featuring 1.5 Carat Diamonds (Main View)

1.5 Carat Diamonds set in 14k Rose Gold Open Tapered Cathedral Solitaire Diamond Engagement Ring (Side View)

One Carat Lab Diamond Solitaire Tapered Band Engagement Ring Platinum Ada Diamonds Design AD-147

High Quality 1.25 Carat Diamonds set in Yellow Gold Open Tapered Cathedral Solitaire Diamond Engagement Ring (Main View)

High Quality 2.0 ct Diamonds set in Platinum Open Tapered Cathedral Solitaire (Main View)

2.0 ct Diamonds set in Platinum Open Tapered Cathedral Solitaire (Profile View)

Exceptional Quality Lab Diamonds Open Tapered Cathedral Solitaire Diamond Engagement Ring in Yellow Gold (Main View)

High Quality 1.0 ctw Diamonds set in Platinum Open Tapered Cathedral Solitaire Diamond Engagement Ring (Main View)

High Quality 1.25 ct Lab Diamonds set in 18kt Yellow Gold Open Tapered Cathedral Solitaire Diamond Engagement Ring (Main View)

High Quality 1.5 Carat Diamonds set in Yellow Gold Open Tapered Cathedral Solitaire Diamond Engagement Ring (Main View)

Platinum Open Tapered Cathedral Solitaire featuring 1.5 Carat Cushion Cut Lab Diamonds (Main View)

1.50ct oval lab diamond in rose gold tapered solitaire

2.0 Carat Diamonds Open Tapered Cathedral Solitaire in Platinum (Main View)

platinum 2.5ct cushion cut lab diamond cathedral solitaire engagement ring with tapered band on model ada diamonds design ad 247

White Gold 2.5ct Round Open Cathedral Solitaire Lab Diamond Engagement Ring Ada Diamonds Design 147 On Model

Hand Selected 2.0 Carat Synthetic Diamonds set in Platinum Open Tapered Cathedral Solitaire (Profile View)

18k Yellow Gold Open Tapered Cathedral Solitaire featuring High Quality 1.25 ct Diamonds (Side View)

2.0 Carat Lab Created Diamonds set in Platinum Open Tapered Cathedral Solitaire Diamond Engagement Ring (Main View)

2ct Round Open Tapered Cathedral Solitaire Engagement Ring in Platinum

Platinum Open Tapered Cathedral Solitaire featuring 2.0 Carat Lab Diamonds (Profile View)

2ct Round Open Tapered Cathedral Solitaire Engagement Ring Profile View in Platinum

Platinum Open Tapered Cathedral Solitaire featuring 2.5 Carat Diamonds (Main View)

2.5ct Cushion Cut Open Tapered Cathedral Solitaire Engagement Ring in Platinum

1.5 Carat Oval Lab Diamonds set in Rose Gold Open Tapered Cathedral Solitaire Diamond Engagement Ring (Main View)

1.5ct Oval Tapered Cathedral Solitaire Engagement Ring in 14k Rose Gold

Your Choice of Gold: $1,350 USD Platinum: $1,600 USD Pricing is for setting only - center stone priced separately. This style is not available in two-tone.

A modern take on a classic cathedral style, this setting elevates your center stone in a high profile setting with a tapered band. Shown with a tapering from 2.0mm to 1.5mm.

Open Tapered Cathedral Solitaire

Open Cathedral Solitaire

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 San Francisco, New York, and Austin TX.