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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.

Radiant Classic Four Prong Solitaire - Ada Diamonds

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_!

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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

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

Princess Classic Four Prong Solitaire

Radiant Classic Four Prong Pavé Setting

Created Diamonds Radiant Classic Four Prong Solitaire in White Gold (Main View)

White Gold Radiant Classic Four Prong Solitaire Diamond Engagement Ring featuring Lab Created Diamonds (Profile View)

White Gold Radiant Classic Four Prong Solitaire Diamond Engagement Ring featuring Lab Diamonds (Side View)

Yellow Gold Radiant Classic Four Prong Solitaire Diamond Engagement Ring featuring Hand Selected Diamonds (Main View)

Lab Created Diamonds Radiant Classic Four Prong Solitaire Diamond Engagement Ring in Yellow Gold (Main View)

Rose Gold Radiant Classic Four Prong Solitaire featuring Lab Created Diamonds (Main View)

Rose Gold Radiant Classic Four Prong Solitaire featuring Diamonds (Main View)

Exceptional Quality Lab Diamonds set in Platinum & Yellow Gold Radiant Classic Four Prong Solitaire Diamond Engagement Ring (Main View)

Exceptional Quality Man Made Diamonds Radiant Classic Four Prong Solitaire in Platinum & Yellow Gold (Profile View)

Hand Selected Diamonds Radiant Classic Four Prong Solitaire Diamond Engagement Ring in Platinum & Yellow Gold (Profile View)

Lab Diamonds set in Platinum & Rose Gold Radiant Classic Four Prong Solitaire Diamond Engagement Ring (Main View)

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

Diamonds Radiant Classic Four Prong Solitaire in Platinum & Rose Gold (Main View)

Platinum & Rose Gold Radiant Classic Four Prong Solitaire featuring High Quality Lab Diamonds (Profile View)

Platinum 3ct Emerald Cut Lab Diamond Classic Solitaire Ada Diamonds Design AD-332 Artistic

Radiant Classic Four Prong Solitaire Diamond Engagement Ring featuring Exceptional Quality Diamonds

Platinum Radiant Classic Four Prong Solitaire Diamond Engagement Ring featuring 3.0 ct Diamonds (Main View)

Platinum Radiant Classic Four Prong Solitaire featuring 3.0 Carat Lab Created Diamonds (Profile View)

2.0 ct Lab Diamonds Radiant Classic Four Prong Solitaire Diamond Engagement Ring in White Gold (Profile View)

14k Rose Gold 1.5ct Radiant Cut Lab Diamond Solitaire Engagement Ring Ada Diamonds Design AD-332 Profile

14k Rose Gold 1.5ct Radiant Cut Lab Diamond Solitaire Engagement Ring Ada Diamonds Design AD-332 on Model

Two Tone White and Yellow Gold 2ct Radiant Cut Lab Diamond Solitaire Engagement Ring Ada Diamonds Design AD-332 on Model

High Quality 2.0 Carat Diamonds Radiant Classic Four Prong Solitaire in Yellow Gold (Main View)

18k White Gold Radiant Classic Four Prong Solitaire featuring 2.25 Carat Lab Diamonds (Main View)

Yellow Gold Radiant Classic Four Prong Solitaire featuring 2.5 Carat Synthetic Diamonds (Main View)

platinum 3 carat radiant cut lab diamond solitaire engagement ring on model ada diamonds design ad 332

radiant classic four prong solitaire in platinum

Platinum Radiant Classic Four Prong Solitaire Diamond Engagement Ring featuring 3.0 Carat Lab Created Diamonds (Main View)

" 3.0ct Radiant Classic Four Prong Solitaire Diamond Engagement Ring in Platinum"

" Radiant Classic Four Prong Solitaire: A 3.0 Carat Lab-Created Diamond Engagement Ring in Platinum - Profile View"

2.5 ct Lab Diamonds set in Yellow Gold Radiant Classic Four Prong Solitaire Diamond Engagement Ring

"Unveiling the 2.5ct Radiant Classic Four Prong Solitaire Engagement Ring in 14k Yellow Gold | AD-332"

Rose Gold Radiant Classic Four Prong Solitaire featuring 1.75 ct Synthetic Diamonds (Main View)

" 1.75 ct Radiant Classic Four Prong Solitaire Engagement Ring in 14k Rose Gold"

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

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

Radiant 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 San Francisco, New York, and Austin TX.