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.

Asscher 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

Emerald and Trapezoid Setting

Asscher Three Stone Setting

White Gold Asscher and Trapezoid Setting featuring Diamonds (Main View)

White Gold Asscher and Trapezoid Setting featuring Exceptional Quality Created Diamonds (Profile View)

Lab Diamonds Asscher and Trapezoid Setting in White Gold (Side View)

Synthetic Diamonds set in Yellow Gold Asscher and Trapezoid Diamond Engagement Ring (Main View)

Diamonds set in Yellow Gold Asscher and Trapezoid Setting (Main View)

Diamonds set in Rose Gold Asscher and Trapezoid Setting (Main View)

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

Lab Diamonds set in Platinum & Yellow Gold Asscher and Trapezoid Setting (Main View)

Lab Grown Diamonds Asscher and Trapezoid Setting in Platinum & Yellow Gold (Profile View)

2.0 ct Lab Created Diamonds set in Platinum & Yellow Gold Asscher and Trapezoid Diamond Engagement Ring (Main View)

Man Made Diamonds set in Platinum & Yellow Gold Asscher and Trapezoid Diamond Engagement Ring (Profile View)

Hand Selected Diamonds Asscher and Trapezoid Setting in Platinum & Rose Gold (Main View)

Exceptional Quality Lab Grown Diamonds set in Platinum & Rose Gold Asscher and Trapezoid Setting (Profile View)

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

Platinum & Rose Gold Asscher and Trapezoid Setting featuring Exceptional Quality Diamonds (Profile View)

platinum 3.5 carat asscher cut lab diamond engagement ring with trapezoid side stones ada diamonds design ad 494 macro

18k white gold 3.5 carat asscher cut lab diamond with trapezoids ada diamonds design ad 494 profile

2.75ct asscher cut in three stone platinum setting

Platinum 2 Carat Asscher Cut Manmade Diamond Ring with Trapezoid Side Stones Ada Diamonds Design AD-494 Macro

18k White Gold 2 Carat Asscher and Trapezoid Lab Diamond Three Stone Ring Ada Diamonds Design AD-494 Profile

Hand Selected 2.75 Carat Lab Grown Diamonds set in Platinum Asscher and Trapezoid Diamond Engagement Ring (Profile View)

18k White Gold 2 Carat Asscher and Trapezoid Lab Diamond Three Stone Ring Ada Diamonds Design AD-494 Artistic

2.75ct asscher lab diamond in three stone setting

platinum 3.5 ct asscher cut and trapezoid three stone lab diamond engagement ring ada diamonds design ad 494 on model

3.5 ctw Lab Diamonds set in Platinum Asscher and Trapezoid Setting (Main View)

4.5ctw Asscher and Trapezoid Engagement Ring in Platinum

High Quality 3.5 ctw Diamonds Asscher and Trapezoid Diamond Engagement Ring in Platinum (Profile View)

4.5ctw Asscher and Trapezoid Engagement Ring in Platinum Profile View

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 step cut trapezoid lab grown diamond side stones in a basket or trellis style.

Asscher 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.