White Default Shadow

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.

Princess 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_!

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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

Princess and Half Moon Setting

Princess and Trapezoid Setting

Diamonds set in White Gold Princess Three Stone Setting (Main View)

Lab Diamonds Princess Three Stone Setting in White Gold (Profile View)

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

Yellow Gold Princess Three Stone Diamond Engagement Ring featuring Diamonds (Main View)

Hand Selected Diamonds Princess Three Stone Setting in Rose Gold (Main View)

Rose Gold Princess Three Stone Setting featuring Man Made Diamonds (Main View)

Platinum & Yellow Gold Princess Three Stone Diamond Engagement Ring featuring High Quality Diamonds (Main View)

Lab Grown Diamonds Princess Three Stone Setting in Platinum & Yellow Gold (Profile View)

Lab Created Diamonds Princess Three Stone Diamond Engagement Ring in Platinum & Yellow Gold (Profile View)

Diamonds set in Platinum & Rose Gold Princess Three Stone Setting (Main View)

Hand Selected Man Made Diamonds set in Platinum & Rose Gold Princess Three Stone Setting (Profile View)

Platinum & Rose Gold Princess Three Stone Setting featuring Lab Grown Diamonds (Main View)

Lab Created Diamonds set in Platinum & Rose Gold Princess Three Stone Setting (Profile View)

two-tone yellow gold and platinum 3 ct princess cut lab diamond three stone ring ada diamonds design ad 477

platinum and yellow gold princess three stone lab diamond ring ada diamonds design ad 477 on model

3 carat princess cut man made diamond three stone engagement ring in two-tone setting ada diamonds design ad 477

princess cut three stone lab created diamond engagement ring two tone yellow gold and platinum ada diamonds design ad 477

2.0 ct Diamonds set in Platinum & Yellow Gold Princess Three Stone Setting (Main View)

3ctw Princess Three Stone Engagement Ring in Platinum & 14k Yellow Gold

Hand Selected 2.0 ct Lab Grown Diamonds Princess Three Stone Diamond Engagement Ring in Platinum & Yellow Gold (Profile View)

3ctw Princess Three Stone Engagement Ring in Platinum and 14k Yellow Gold Profile View

Your Choice of Gold: 0.20ct Each Side Stones (~0.40ctw): $2,650 USD0.30ct Each Side Stones (~0.60ctw): $2,900 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.

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

Princess Three Stone 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 San Francisco, New York, and Austin TX.