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;

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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.

2.0 Carat Lab Diamonds set in Yellow Gold Round Three Stone Diamond Engagement Ring (Main View)

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 Round Setting

Oval and Round Setting

Lab Diamonds set in White Gold Round Three Stone Diamond Engagement Ring (Main View)

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

Lab Diamonds Round Three Stone Diamond Engagement Ring in White Gold (Side View)

Hand Selected Diamonds Round Three Stone Diamond Engagement Ring in Yellow Gold (Main View)

High Quality Lab Diamonds set in Yellow Gold Round Three Stone Diamond Engagement Ring (Main View)

High Quality Created Diamonds Round Three Stone Diamond Engagement Ring in Rose Gold (Main View)

Lab Created Diamonds Round Three Stone Diamond Engagement Ring in Rose Gold (Main View)

platinum 3.5 ct round lab diamond three stone ring ada diamonds design ad 070

platinum 3.5 carat round lab created diamond three stone engagement ring ada diamonds design ad 070

3.0 ctw Diamonds set in White Gold Round Three Stone Diamond Engagement Ring (Main View)

2.0 ct Diamonds set in Platinum Round Three Stone Diamond Engagement Ring (Main View)

1.5 Carat Lab Grown Diamonds Round Three Stone Diamond Engagement Ring in Yellow Gold (Main View)

1.5 ct Lab Diamonds Round Three Stone Setting in Yellow Gold (Profile View)

Yellow Gold Round Three Stone Setting featuring 3.0 Carat Synthetic Diamonds (Side View)

1.5 Carat Diamonds Round Three Stone Diamond Engagement Ring in Yellow Gold (Main View)

platinum four carat round three stone lab diamond engagement ring ada diamonds design ad 070

platinum round 2.5ct lab diamond engagement ring with round side stones ada diamonds design ad 070

Round Three Stone Lab Diamond Engagement Ring Design AD-070

Platinum 2.25 Carat Three Stone Engagement Ring with Round Brilliant Lab Created Diamonds Ada Diamonds Design AD-070

White Gold Round Three Stone Diamond Engagement Ring featuring High Quality 1.0 ct Lab Diamonds (Main View)

Yellow Gold Round Three Stone Setting featuring 1.5 Carat Diamonds (Main View)

Platinum 2.25ct Round Brilliant Three Stone Engagement Ring with Lab Diamonds Ada Diamonds Design AD-070

Platinum Round Three Stone Diamond Engagement Ring featuring 1.75 Carat Lab Diamonds (Main View)

Trellis Platinum Round Three Stone Lab Diamond Engagement Ring Ada Diamonds Design AD-070

14 Karat Yellow Gold Round Three Stone Lab Created Diamond Engagement Ring Yellow Gold Ada Diamonds Design AD-070

Platinum Round Three Stone Diamond Engagement Ring featuring 1.25 ct Diamonds (Main View)

round man made diamonds in a three stone engagement ring set in 18k white and yellow gold Ada Diamonds Design AD-070

Hand Selected 2.25 Carat Synthetic Diamonds Round Three Stone Setting in Platinum & Yellow Gold (Profile View)

1.5 ct Lab Diamonds Round Three Stone Setting in Rose Gold (Main View)

18k Rose Gold Three Stone Round Engagement Ring With Lab Grown Diamonds Ada Diamonds Design Number AD-070 Artistic Profile photo of ring

Two Tone White and Yellow Gold 1.5 Carat Round Lab Diamond Engagement Ring Ada Diamonds Design AD-070 Artistic Image

2.0 ct Diamonds Round Three Stone Setting in Platinum (Profile View)

Hand Selected 2.5 Carat Diamonds Round Three Stone Setting in Platinum (Main View)

Exceptional Quality 1.5 Carat Synthetic Diamonds set in Platinum Round Three Stone Setting (Main View)

platinum 1 ct round three stone lab diamond trellis engagement ring ada diamonds design ad 070

1 carat man made diamond in a 14k yellow gold round three stone setting on model Ada Diamonds design AD-070

excellent round 1.25 carat lab diamond ring with matching round side stones set in 14k white gold shown on model. Ada Diamonds Design AD070

yellow gold 2 ct round three stone lab diamond engagement ring ada diamonds design ad070 on model

yellow gold 2.25ct round three stone lab diamond engagement ring ada diamonds design number ad 070

classic 2-tone setting with 1.5ct lab grown diamond center stone accompanied by round side stones. Ada Diamonds Design AD-070

Platinum 2.25ct Round Three Stone Lab Created Diamond Engagement Ring Ada Diamonds Design AD-070 on Hand

lab created three stone engagement ring set in 14 karat white gold with a 2 carat center stone pictured on hand ada diamonds design ad-070

2.25 carat round three stone lab grown diamond engagement ring in 18 karat yellow gold on hand Ada Diamonds design AD-070

Platinum Three Stone Engagement Ring with 2.5 Carat Round Lab Diamond Ada Diamonds Design Number AD-070 on Model

2.5 Carat Diamonds Round Three Stone Diamond Engagement Ring in Platinum (Main View)

ideal round 3 carat lab grown diamond with round side stones on model Ada Diamonds Design AD-070

18k white gold ideal round 3 carat lab grown diamond with round side stones on model Ada Diamonds Design AD-070

trellis basket on three stone engagement ring

Diamonds set in Platinum Round Three Stone Setting

platinum 2 carat round three stone lab diamond ring with matching prong set Lab grown Diamond Wedding Band Ada Diamonds Design AD-070 and AD-071 on Model photograph

Three Stone Round Setting Lab Grown Diamond Engagement Ring Paired with a Laboratory Grown Shared Prong Wedding Band. On Model photo AD070

White Gold Round Three Stone Diamond Engagement Ring featuring 3.0 Carat Lab Diamonds (Main View)

3.5ctw Round Three Stone Engagement Ring in 18k White Gold

Exceptional Quality 3.0 ct Diamonds Round Three Stone Setting in White Gold (Profile View)

Yellow Gold Round Three Stone Diamond Engagement Ring featuring 1.5 ct Lab Diamonds (Main View)

2.5ctw Round Three Stone Engagement Ring in 14k Yellow Gold

Rose Gold Round Three Stone Setting featuring 1.5 ct Lab Created Diamonds (Main View)

1.75ctw Round Three Stone Engagement Ring in 18k Rose Gold

Your Choice of Gold: 0.20ct Each Side Stones (0.4ctw): $2,650 USD0.25ct Each Side Stones (0.5ctw): $2,750 USD0.30ct Each Side Stones (0.6ctw): $2,900 USD0.40ct Each Side Stones (0.8ctw): $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.

A brilliant classic, this three stone setting features a pair of round lab grown side stones. Available in trellis or basket style.

Round Three Stone Setting

Three Stone Trellis

Custom made-to-order round 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.