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.

Radiant Three Stone 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

White Gold Radiant Three Stone Diamond Engagement Ring featuring High Quality Lab Diamonds (Main View)

Lab Grown Diamonds Radiant Three Stone Diamond Engagement Ring in White Gold (Profile View)

High Quality Lab Created Diamonds set in White Gold Radiant Three Stone Diamond Engagement Ring (Side View)

Lab Diamonds Radiant Three Stone Setting in Yellow Gold (Main View)

Diamonds set in Rose Gold Radiant Three Stone Diamond Engagement Ring (Main View)

Diamonds set in Rose Gold Radiant Three Stone Setting (Main View)

platinum 3.5ct radiant cut three stone lab diamond engagement ring ada diamonds design ad 484

platinum and 18k yellow gold 2.5 ct radiant cut three stone lab diamond engagement ring ada diamonds design ad 484 macro

profile of 2.5 carat radiant lab diamond three stone engagement ring ada diamonds design ad 484

High Quality 2.0 Carat Lab Diamonds Radiant Three Stone Diamond Engagement Ring in Platinum & Yellow Gold (Side View)

platinum and yellow gold 2.5ct radiant cut three stone lab diamond engagement ring ada diamonds design ad 484 on model

platinum 3.5 carat radiant cut three stone engagement ring with lab created diamonds ada diamonds design ad 484 on model

custom two-tone 2.5 ct radiant cut man made diamond engagement ring ada diamonds design ad 484 on model profile view

Platinum Radiant Three Stone Diamond Engagement Ring featuring 2.25 Carat Lab Diamonds (Main View)

3.25ctw Radiant Three Stone Engagement Ring in Platinum

Platinum Radiant Three Stone Diamond Engagement Ring featuring Exceptional Quality 2.25 ct Diamonds (Profile View)

3.25ctw Radiant Three Stone Engagement Ring in Platinum Profile View

Platinum & Yellow Gold Radiant Three Stone Diamond Engagement Ring featuring 2.0 ct Lab Created Diamonds (Main View)

2.5ctw Radiant Three Stone Engagement Ring in Platinum & 18k Yellow Gold

Your Choice of Gold: 0.20ct Each Side Stones (~0.40ctw): $2,650 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. Side stones at or below 0.50ct will be uncertified and hand-selected to match your center stone. Side stones above 0.50ct are available upon request and are individually certified. Platinum and two-tone available for an additional $300 fee. This style must be modified to accommodate a mixed-metal setting.

Dainty and delightful, this setting features a matched pair of square or elongated radiant cut lab grown diamond side stones in a trellis or basket style setting.

Radiant Three Stone Setting

Three Stone Trellis

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.