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.

Princess Classic Four Prong Solitaire - Ada Diamonds

Exceptional Quality 3.0 ct Created Diamonds set in Platinum Princess Classic Four Prong Solitaire Diamond Engagement Ring (Main View)

Not sure what style your sweetheart desires? Ensure your proposal is a complete surprise! A non-customized version of this setting qualifies for our <a href="/proposal-settings">Proposal Setting program</a>.

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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

Asscher Classic Four Prong Solitaire

Round Classic Four Prong Solitaire

Cushion Classic Four Prong Solitaire

Emerald Classic Four Prong Solitaire

Oval Classic Four Prong Solitaire

Radiant Classic Four Prong Solitaire

Princess Classic Four Prong Pavé Setting

Lab Diamonds set in White Gold Princess Classic Four Prong Solitaire Diamond Engagement Ring (Main View)

Lab Diamonds set in White Gold Princess Classic Four Prong Solitaire Diamond Engagement Ring (Profile View)

Hand Selected Lab Diamonds Princess Classic Four Prong Solitaire in White Gold (Side View)

Yellow Gold Princess Classic Four Prong Solitaire Diamond Engagement Ring featuring High Quality Diamonds (Main View)

High Quality Diamonds set in Yellow Gold Princess Classic Four Prong Solitaire Diamond Engagement Ring (Main View)

Exceptional Quality Diamonds Princess Classic Four Prong Solitaire in Rose Gold (Main View)

Rose Gold Princess Classic Four Prong Solitaire Diamond Engagement Ring featuring Hand Selected Lab Diamonds (Main View)

Hand Selected Lab Diamonds set in Platinum & Yellow Gold Princess Classic Four Prong Solitaire Diamond Engagement Ring (Main View)

Lab Diamonds set in Platinum & Yellow Gold Princess Classic Four Prong Solitaire (Profile View)

Platinum & Yellow Gold Princess Classic Four Prong Solitaire Diamond Engagement Ring featuring High Quality Lab Diamonds (Profile View)

High Quality Diamonds Princess Classic Four Prong Solitaire in Platinum & Rose Gold (Main View)

Platinum & Rose Gold Princess Classic Four Prong Solitaire Diamond Engagement Ring featuring Synthetic Diamonds (Profile View)

Lab Diamonds set in Platinum & Rose Gold Princess Classic Four Prong Solitaire (Main View)

Lab Diamonds set in Platinum & Rose Gold Princess Classic Four Prong Solitaire (Profile View)

platinum 3.25 carat princess lab diamond engagement ring ada diamonds design ad-227

3.25 Carat Man Made Diamonds Princess Classic Four Prong Solitaire in Platinum (Profile View)

3.25 Carat Synthetic Diamonds set in Platinum Princess Classic Four Prong Solitaire Diamond Engagement Ring (Main View)

3.25ct princess cut lab diamond solitaire engagement ring platinum ada diamonds design 227

2.5 ct Man Made Diamonds Princess Classic Four Prong Solitaire in Yellow Gold (Main View)

classic four prong solitaire in yellow gold

18k White Gold Two Carat Princess Cut Lab Diamond Solitaire Engagement Ring Ada Diamonds Design AD-227 Artistic

18k White Gold 2ct Princess Cut Lab Created Diamond Solitaire Engagement Ring Ada Diamonds Design AD-227 Profile

Platinum 1.25ct Princess Cut Solitaire with Lab Diamond Ada Diamonds Design AD-227 Artistic

3.25ct princess cut lab created diamond solitaire platinum ada diamonds design ad 227

platinum 1.25 Carat Princess Four Prong Lab Created Diamond Solitaire Ada Diamonds Design AD-227 Profile

1.75 ct lab grown diamond princess cut solitaire in 14k yellow goldt

One Carat Princess Cut Solitaire Engagement Ring in Platinum with Lab Diamonds Ada Diamonds Design Number AD227 Macro Shot in Box

One Carat Princess Cut Solitaire Engagement Ring in Platinum with Lab Diamonds Ada Diamonds Design Number AD227 Profile View in Box

Platinum 1.5 Carat Princess Cut Solitaire Lab Diamond Engagement Ring Ada Diamonds Design AD-216 in Blue Bo

1.5 Carat Synthetic Diamonds Princess Classic Four Prong Solitaire Diamond Engagement Ring in Platinum (Main View)

Platinum Princess Classic Four Prong Solitaire Diamond Engagement Ring featuring 1.5 Carat Man Made Diamonds (Side View)

1.0 Carat Diamonds Princess Classic Four Prong Solitaire Diamond Engagement Ring in Platinum (Main View)

Platinum 1.25 Carat Cushion Cut Man Made Diamond Solitaire Engagement Ring Ada Diamonds Design AD227 on Hand Image

Platinum 1.5 Carat Princess Cut Solitaire Diamond Ring on Hand featuring Lab Diamonds Ada Diamonds Design Number 227

1.75ct princess cut lab diamond in yellow gold solitaire

2ct lab diamond princess cut in solitaire setting

platinum 2.25ct princess cut lab diamond solitaire engagement ring ada diamonds design ad 227 on model

2.5ct princess cut lab diamond in yellow gold classic four prong solitaire

platinum 3.25ct princess cut lab diamond solitaire engagement ring on model ada diamonds design 227

High Quality Lab Grown Diamonds set in Princess Classic Four Prong Solitaire Diamond Engagement Ring

3.25 Carat Lab Diamonds Princess Classic Four Prong Solitaire in Platinum (Main View)

3.25ct Princess Cut Classic Solitaire Engagement Ring in Platinum

3.25 Carat Lab Diamonds Princess Classic Four Prong Solitaire Diamond Engagement Ring in Platinum (Main View)

3.25ct Princess Classic Solitaire Engagement Ring in Platinum

Hand Selected 1.75 ct Lab Diamonds Princess Classic Four Prong Solitaire in Yellow Gold (Main View)

1.75ct Princess Classic Solitaire Engagement Ring in 14k Yellow Gold

Your Choice of Gold: $1,250 USD Platinum &amp; Two-Tone: $1,500 USD Pricing is for setting only - center stone priced separately.

Unforgettably elegant, this setting features four prongs for maximum security. Customize your lab diamond solitaire engagement ring with band widths of 1.8-2.5mm.

Princess Classic Four Prong Solitaire

Classic Solitaires

Custom made-to-order solitaire engagement 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.