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.

Oval and Trapezoid Setting - 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

Cushion and Trapezoid Setting

Princess and Trapezoid Setting

Radiant and Trapezoid Setting

Oval and Half Moon Setting

Hand Selected Synthetic Diamonds set in White Gold Oval and Trapezoid Setting (Main View)

Created Diamonds set in White Gold Oval and Trapezoid Diamond Engagement Ring (Profile View)

White Gold Oval and Trapezoid Setting featuring Diamonds (Side View)

Created Diamonds Oval and Trapezoid Diamond Engagement Ring in Yellow Gold (Main View)

Yellow Gold Oval and Trapezoid Diamond Engagement Ring featuring Lab Diamonds (Main View)

Rose Gold Oval and Trapezoid Diamond Engagement Ring featuring Lab Created Diamonds (Main View)

Lab Created Diamonds set in Rose Gold Oval and Trapezoid Setting (Main View)

Diamonds Oval and Trapezoid Diamond Engagement Ring in Platinum & Yellow Gold (Main View)

Platinum & Yellow Gold Oval and Trapezoid Diamond Engagement Ring featuring Hand Selected Diamonds (Profile View)

2.0 ct Diamonds set in Platinum & Yellow Gold Oval and Trapezoid Setting (Main View)

Platinum & Yellow Gold Oval and Trapezoid Setting featuring Diamonds (Profile View)

Diamonds Oval and Trapezoid Setting in Platinum & Rose Gold (Main View)

Platinum & Rose Gold Oval and Trapezoid Setting featuring Lab Diamonds (Profile View)

Lab Grown Diamonds Oval and Trapezoid Setting in Platinum & Rose Gold (Main View)

Diamonds set in Platinum & Rose Gold Oval and Trapezoid Diamond Engagement Ring (Profile View)

platinum 2.5 ct oval lab diamond ring with trapezoid side stones ada diamonds design ad 462 macro

18k white gold 2.5 carat oval lab created  diamond three stone ring with trapezoid side stones design ad 462 profile view

14k yellow gold oval and trapezoid three stone lab diamond engagement ring ada diamonds design ad 462 macro

platinum three stone engagement ring featuring 3.5ct oval and step cut trapezoid lab grown diamond side stones ada diamonds design ad-462

18k white gold engagement ring featuring 3.5ct oval and step cut trapezoid lab made diamonds ada diamonds design ad-462

Platinum Oval and Trapezoid Setting featuring 2.0 Carat Diamonds (Profile View)

1.5 Carat Synthetic Diamonds Oval and Trapezoid Diamond Engagement Ring in Yellow Gold (Profile View)

yellow gold 1.25 carat oval and trapezoid three stone lab diamond engagement ring ada diamonds design ad 462 on model

platinum 2.5 carat oval and trapezoid lab diamond engagement ring white gold ada diamonds design ad 462

platinum engagement ring featuring 3.5ct oval and step cut trapezoid lab grown diamond ada diamonds design ad-462

white gold oval and trapezoid setting with a 3.5ct oval laboratory grown diamond center stone

white gold profile view of 2.5 carat oval and trapezoid three stone lab grown diamond engagement ring ada diamonds design ad 462

Hand Selected 2.0 Carat Lab Diamonds Oval and Trapezoid Diamond Engagement Ring in Platinum (Main View)

2.5ctw Oval and Trapezoid Engagement Ring in Platinum

Platinum Oval and Trapezoid Setting featuring 2.0 Carat Lab Grown Diamonds (Profile View)

2.5ctw Oval and Trapezoid Three Stone Engagement Ring in Platinum Profile View

1.25 Carat Synthetic Diamonds Oval and Trapezoid Setting in Yellow Gold (Main View)

1.6ctw Oval and Trapezoid Three Stone Engagement Ring in 14k Yellow Gold

Your Choice of Gold: 0.20ct Each Side Stones (~0.40ctw): $2,650 USD0.25ct Each Side Stones (~0.50ctw): $2,750 USD0.30ct Each Side Stones (~0.60ctw): $2,900 USD0.40ct Each Side Stones (~0.80ctw): $3,450 USD0.50ct Each Side Stones (~1.0ctw): $3,750 USD Starting at price is for the setting and side stones only (center stone priced separately) and includes DEF/VS lab grown diamond side stones. Platinum and two-tone available for an additional $300 fee. Subject to availability; all side stone weights and measurements are approximate.

A modern three stone engagement ring setting, featuring a pair of brilliant cut trapezoid lab grown diamond side stones in a basket or trellis style.

Oval and Trapezoid Setting

Three Stone Basket

Custom made-to-order three stone 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.