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Big News: Ada Diamonds Joins the Sasha Primak Family

We are excited to announce that Ada Diamonds has joined Sasha Primak, a luxury jewelry manufacturer based in New York. For years, Sasha Primak has been a trusted partner of Ada Diamonds, crafting many of the exquisite pieces Ada customers wear today.We have the utmost respect for Ada’s founders and are committed to preserving their legacy, values, and the integrity of the Ada brand. Our dedication to exceptional quality, craftsmanship, and innovation remains unchanged.Ada Diamonds' showroom will be relocating to our state-of-the-art 5th Avenue facility, where customers will continue to enjoy the curated luxury experience they love. Visitors will also have the unique opportunity to see master artisans at work, bringing their jewelry dreams to life from start to finish.For any questions regarding past purchases, warranties, or future custom jewelry inquiries, please contact <a href="mailto:concierge@adadiamonds.com">concierge@adadiamonds.com</a>.Stay tuned for more exciting updates as we continue to create exquisite, high-quality jewelry for our valued customers.

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>!

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.

Terms &amp; Conditions:<ul><li>Discount applies to select styles only.</li><li>This offer does not apply to custom-designed jewelry or settings.</li><li>A full diamond purchase is required to qualify for the discount; deposits (20%) are excluded.</li><li>Settings are eligible for a discount only with the purchase of a diamond.</li><li>Offer is valid for new purchases only and does not apply to previous transactions.</li><li>This promotion is available for a limited time and may be withdrawn at any time without notice.</li><li>This offer cannot be combined with any other promotions, discounts, or special offers.</li></ul>

Terms &amp; Conditions:<ul><li>Discount applies to select styles only.</li><li>This offer does not apply to custom-designed jewelry or settings.</li><li>Offer is valid for new purchases only and does not apply to previous transactions.</li><li>This promotion is available for a limited time and may be withdrawn at any time without notice.</li><li>This offer cannot be combined with any other promotions, discounts, or special offers.</li></ul>

Round Classic Six Prong Solitaire - Ada Diamonds

Lab Created Diamonds Round Classic Six Prong Solitaire Diamond Engagement Ring in Platinum

Not sure what she wants? We can help. Propose with a classic solitaire, and then design a custom ring together.

Proposal Settings

Floral Basket Solitaire Diamond Engagement Ring featuring Man Made Diamonds (Profile View)

Floral Basket Solitaire featuring Diamonds (Profile View)

See why real couples chose Ada to tell their love story

They Said Yes! 

At Ada Diamonds, we’re different,&nbsp;we’re better, we’re worth it. Book your complimentary consultation now

The Most Trusted Experts in Lab Diamonds

Diamonds set in Pear Petite Pavé Setting (Profile View)

Pear Petite Pavé Diamond Engagement Ring featuring High Quality Lab Diamonds (Profile View)

Ready to Begin Your Concierge Experience?

Engagement Modal Form

Round Trellis Six Prong Pavé Setting

White Gold Round Classic Six Prong Solitaire Diamond Engagement Ring featuring Diamonds (Main View)

Lab Diamonds Round Classic Six Prong Solitaire Diamond Engagement Ring in White Gold (Profile View)

Man Made Diamonds Round Classic Six Prong Solitaire in White Gold (Side View)

Lab Diamonds Round Classic Six Prong Solitaire in Yellow Gold (Main View)

Yellow Gold Round Classic Six Prong Solitaire featuring Hand Selected Created Diamonds (Main View)

Exceptional Quality Diamonds set in Rose Gold Round Classic Six Prong Solitaire (Main View)

Diamonds Round Classic Six Prong Solitaire Diamond Engagement Ring in Rose Gold (Main View)

High Quality Lab Diamonds Round Classic Six Prong Solitaire Diamond Engagement Ring in Platinum & Yellow Gold (Main View)

Lab Diamonds Round Classic Six Prong Solitaire Diamond Engagement Ring in Platinum & Yellow Gold (Profile View)

Platinum & Yellow Gold Round Classic Six Prong Solitaire featuring 2.0 ct Diamonds (Main View)

Lab Grown Diamonds Round Classic Six Prong Solitaire in Platinum & Yellow Gold (Profile View)

Platinum & Rose Gold Round Classic Six Prong Solitaire featuring Lab Diamonds (Main View)

Lab Diamonds Round Classic Six Prong Solitaire in Platinum & Rose Gold (Profile View)

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

Lab Grown Diamonds set in Platinum & Rose Gold Round Classic Six Prong Solitaire Diamond Engagement Ring (Profile View)

platinum 3 ct round six prong lab diamond solitaire engagement ring ada diamonds design ad 067 macto

3.0 Carat Diamonds set in Platinum Round Classic Six Prong Solitaire Diamond Engagement Ring (Profile View)

3.75 carat round classic six prong lab diamond solitaire engagement ring in platinum ada diamonds design ad 067

3.75 Carat Diamonds set in Platinum Round Classic Six Prong Solitaire Diamond Engagement Ring (Side View)

platinum 4 ct round six prong solitaire engagement ring lab diamonds ada diamonds design ad 067

platinum 4 ct round six prong lab diamond solitaire engagement ring platinum ada diamonds design ad 067 macro

custom 4 ct six prong round lab diamond solitaire engagement ring ada diamonds design ad 067 side view

High Quality 4.0 ct Diamonds Round Classic Six Prong Solitaire in Platinum & Yellow Gold (Main View)

4.0 ctw Diamonds Round Classic Six Prong Solitaire Diamond Engagement Ring in Platinum & Yellow Gold (Profile View)

platinum 3.5ct round lab diamond six prong solitaire engagement ring ada diamonds design ad 067 profile

Platinum Round Classic Six Prong Solitaire featuring 5.0 ct Diamonds (Main View)

Platinum Round Classic Six Prong Solitaire Diamond Engagement Ring featuring High Quality 5.0 ct Lab Diamonds (Profile View)

2.75 Carat Lab Diamonds set in Yellow Gold Round Classic Six Prong Solitaire Diamond Engagement Ring (Main View)

2.75 ct Created Diamonds set in Yellow Gold Round Classic Six Prong Solitaire Diamond Engagement Ring (Side View)

Yellow Gold Round Classic Six Prong Solitaire featuring 2.0 Carat Diamonds (Main View)

2.0 ctw Created Diamonds Round Classic Six Prong Solitaire in Yellow Gold (Profile View)

Yellow Gold Round Classic Six Prong Solitaire Diamond Engagement Ring featuring 1.0 ct Man Made Diamonds (Main View)

High Quality 1.0 ctw Lab Diamonds set in Yellow Gold Round Classic Six Prong Solitaire Diamond Engagement Ring (Profile View)

1.25 ctw Diamonds set in Platinum Round Classic Six Prong Solitaire (Main View)

High Quality 1.5 Carat Synthetic Diamonds set in Platinum Round Classic Six Prong Solitaire (Main View)

custom two-tone 1.25 ct round lab diamond six prong solitaire engagement ada diamonds design ad 067 macro

3.0 Carat Lab Diamonds set in Platinum Round Classic Six Prong Solitaire Diamond Engagement Ring (Profile View)

3.0 ctw Lab Diamonds set in Platinum Round Classic Six Prong Solitaire

1.5 Carat Diamonds set in Platinum Round Classic Six Prong Solitaire Diamond Engagement Ring (Profile View)

3.75 ct Synthetic Diamonds set in 14 Karat Yellow Gold Round Classic Six Prong Solitaire (Main View)

18k White and Yellow Gold Custom 2 Carat Six Prong Lab Diamond Solitaire Ada Diamonds Design AD-067 Artistic

Platinum & Rose Gold Round Classic Six Prong Solitaire Diamond Engagement Ring featuring 1.5 Carat Synthetic Diamonds (Profile View)

Platinum Round Classic Six Prong Solitaire featuring Hand Selected 4.0 ct Diamonds (Main View)

4.0 ctw Lab Diamonds Round Classic Six Prong Solitaire Diamond Engagement Ring in Platinum (Profile View)

Raised Six Prong Lab Diamond Solitaire Engagement Ring Yellow Gold Ada Diamonds AD-067

Classic Six Prong Lab Diamond Solitaire Engagement Ring Design AD-067

Platinum Round Classic Six Prong Solitaire Diamond Engagement Ring featuring 2.0 Carat Man Made Diamonds (Main View)

Platinum Round Classic Six Prong Solitaire Diamond Engagement Ring featuring 2.75 Carat Diamonds (Side View)

lab diamond custom wedding set with 1.5ct round six prong solitaire and shared prong half band ada diamonds design ad 067 ad109 and ad 295

3.0 Carat Diamonds Round Classic Six Prong Solitaire Diamond Engagement Ring in Rose Gold (Main View)

Platinum One Carat Tiffany Setting Lab Diamond Engagement Ring Ada Diamonds Design Number AD-067 On Model

platinum 1.25ct round six prong lab diamond solitaire engagement ring ada diamonds design ad 067 on model

18k Yellow Gold 1.5 Carat Round Lab Diamond Solitaire Engagement Ring by Ada Diamonds Design Number AD-067 on Model

Platinum & Rose Gold Round Classic Six Prong Solitaire Diamond Engagement Ring featuring 1.5 Carat Lab Created Diamonds (Main View)

14k Yellow Gold 1.75 Carat Round Brilliant Six Prong Solitaire Ring made with Lab Diamonds Ada Diamonds Design Number AD-67 on Model

18k White Gold 1.75 Carat Round Brilliant Six Prong Solitaire Ring made with Lab Diamonds Ada Diamonds Design Number AD-67 on Model

Yellow and White Gold 1.75 Carat Round Brilliant Six Prong Solitaire Ring made with Lab Diamonds Ada Diamonds Design Number AD-67 on Model

18k yellow gold two carat round lab diamond six prong solitaire engagement ring ada diamonds design ad 067 on model

platinum 2.25ct round lab grown diamond six prong solitaire engagement ring ada diamonds design ad067 on model

Two Tone White and Yellow Gold 2.25 Carat Round Six Prong Tiffany Style Solitaire Engagement Ring Featuring Man Made Diamonds Ada Diamonds Design AD-067 On Hand Image

2.5 Carat Lab Diamonds set in Platinum Round Classic Six Prong Solitaire Diamond Engagement Ring (Main View)

Yellow Gold Round Classic Six Prong Solitaire featuring 2.5 ctw Lab Diamonds (Main View)

2.75 Carat Round Brilliant Classic Six Prong Solitaire Lab Diamond Engagement Ring On Model Design AD-067

2.75 ct Diamonds set in Yellow Gold Round Classic Six Prong Solitaire (Main View)

two-tone yellow gold and platinum 3 carat lab diamond six prong solitaire engagement ring

3.0 Carat Lab Diamonds Round Classic Six Prong Solitaire Diamond Engagement Ring in Platinum (Main View)

Rose Gold Round Classic Six Prong Solitaire featuring 3.0 ct Lab Diamonds ()

3.25ct round lab diamond in six prong solitaire with wedding band

3.25ct round lab diamond in six prong solitaire engagement ring ada diamonds design ad 067 on model

platinum round 3.5ct six prong solitaire engagement ring ada diamonds design ad 067 on model

Platinum & 18k Yellow Gold Round Classic Six Prong Solitaire featuring High Quality 3.75 ct Diamonds (Main View)

3.75 Carat Diamonds Round Classic Six Prong Solitaire Diamond Engagement Ring in Platinum (Main View)

plaitnum four carat round six prong solitaire with lab grown diamond ada diamonds design ad067

5.5 ct Lab Created Diamonds set in Platinum Round Classic Six Prong Solitaire Diamond Engagement Ring (Main View)

two-tone white and yellow gold 4 carat round six prong lab created diamond solitaire engagement ring ada diamonds design ad 067 on model

14k Yellow Gold Round Classic Six Prong Solitaire Diamond Engagement Ring featuring 3.75 Carat Diamonds (Profile View)

Exceptional Quality 3.75 ctw Man Made Diamonds set in Platinum Round Classic Six Prong Solitaire (Main View)

Platinum & Yellow Gold Round Classic Six Prong Solitaire featuring 4.0 Carat Diamonds (Main View)

Round Classic Six Prong Solitaire Diamond Engagement Ring featuring 2.75 ct Diamonds (Main View)

18k yellow gold lab diamond wedding set with 1.5ct round six prong solitaire spacer band and shared prong wedding band ada diamonds design 067 ad295 ad109

Platinum Round Classic Six Prong Solitaire featuring 3.0 Carat Diamonds (Main View)

3ct Classic Six Prong Solitaire Engagement in Platinum

Platinum Round Classic Six Prong Solitaire Diamond Engagement Ring featuring 3.0 ct Diamonds (Profile View)

3ct Round Classic Six Prong Solitaire Engagement Ring in Platinum Profile View

Yellow Gold Round Classic Six Prong Solitaire featuring 2.0 ctw Lab Diamonds (Main View)

2ct Classic Six Prong Solitaire Engagement Ring in 14k Yellow Gold

Rose Gold Round Classic Six Prong Solitaire featuring 3.0 Carat Lab Diamonds

Your Choice of Gold: $1,450 USD Platinum &amp; Two-Tone: $1,700 USD Pricing is for setting only - center stone priced separately.

An absolute classic, this setting can be customized with or without a knife edge. Customize your lab diamond solitaire engagement ring with band widths of 1.8-2.5mm. 

Round Classic Six Prong Solitaire

Classic Six Prong Solitaire - Round

Custom made-to-order round solitaire 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.