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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.

2.0 ct Synthetic Diamonds set in Platinum Twisting Band Solitaire (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

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

High Quality Lab Diamonds set in White Gold Twisting Band Solitaire (Main View)

Diamonds set in White Gold Twisting Band Solitaire (Profile View)

Hand Selected Man Made Diamonds Twisting Band Solitaire in White Gold (Side View)

Lab Diamonds Twisting Band Solitaire in Yellow Gold (Main View)

Yellow Gold Twisting Band Solitaire featuring Lab Diamonds (Main View)

Lab Diamonds set in Rose Gold Twisting Band Solitaire (Main View)

Rose Gold Twisting Band Solitaire Diamond Engagement Ring featuring Diamonds (Main View)

High Quality Lab Diamonds set in Platinum & Yellow Gold Twisting Band Solitaire (Main View)

Diamonds set in Platinum & Yellow Gold Twisting Band Solitaire Diamond Engagement Ring (Profile View)

Platinum & Yellow Gold Twisting Band Solitaire Diamond Engagement Ring featuring Lab Diamonds (Profile View)

Hand Selected Diamonds set in Platinum & Rose Gold Twisting Band Solitaire Diamond Engagement Ring (Main View)

Platinum & Rose Gold Twisting Band Solitaire featuring High Quality Lab Diamonds (Profile View)

Diamonds Twisting Band Solitaire Diamond Engagement Ring in Platinum & Rose Gold (Profile View)

2.5ct round lab diamond solitaire engagement ring in platinum ada diamonds design ad 338

Platinum Twisting Band Solitaire Diamond Engagement Ring featuring Exceptional Quality Round 2.5 ct Lab Diamonds (Side View)

2.5 ct Lab Diamonds set in Platinum Twisting Band Solitaire Diamond Engagement Ring (Side View)

two tone platinum and yellow gold 2.5ct round lab diamond solitaire engagement ring with custom woven band ada diamonds design ad 366 macro

platinum and yellow gold 2.5 ct round lab diamond twisting band solitaire engagement ring ada diamonds design ad 366 profile view

platinum solitaire twisting band with lab diamond

2.0 Carat Diamonds Twisting Band Solitaire in Yellow Gold (Main View)

Yellow Gold Twisting Band Solitaire Diamond Engagement Ring featuring Exceptional Quality 2.0 Carat Lab Grown Diamonds (Side View)

Yellow Gold Twisting Band Solitaire featuring 2.0 Carat Diamonds (Profile View)

1.75ct asscher cut lab diamond twisting band solitaire engagement ring ada diamonds design ad 366

1.75 ct asscher cut lab diamond in yellow gold twisting band solitaire engagement ring ada diamonds design ad 366 macro

High Quality 1.75 ct Synthetic Diamonds set in Platinum Twisting Band Solitaire Diamond Engagement Ring (Main View)

Exceptional Quality 2.0 Carat Lab Diamonds set in Platinum Twisting Band Solitaire (Profile View)

High Quality 1.5 Carat Lab Diamonds set in Platinum Twisting Band Solitaire Diamond Engagement Ring (Main View)

platinum oval 2.75ct six prong lab diamond solitaire with twisting band ada diamonds design ad 368 macro

platinum 2.75ct oval solitaire engagement ring with twisting band featuring a lab created diamond ada diamonds design ad 366 profile

1.5ct round lab diamond solitaire engagement ring with twisting band in platinum design 366

Platinum Twisting Band Solitaire featuring 1.5 ctw Oval Lab Diamonds (Main View)

14k yellow gold 1.75ct asscher lab diamond in twisting band solitaire ada diamonds design ad 366 on model

1.75 Carat Lab Diamonds set in Platinum Twisting Band Solitaire Diamond Engagement Ring (Main View)

2.5 Carat Lab Diamonds set in Platinum Twisting Band Solitaire Diamond Engagement Ring (Main View)

Hand Selected 2.5 ct Round Lab Grown Diamonds set in Platinum & Yellow Gold Twisting Band Solitaire Diamond Engagement Ring (Main View)

platinum 2.75ct oval six prong solitaire engagement ring twisting band ada diamonds design ad 366 on model

1.5 ctw Lab Diamonds set in Platinum Twisting Band Solitaire (Profile View)

1.5 ct Diamonds set in Platinum Twisting Band Solitaire (Profile View)

2.5ct Round Twisting Band Solitaire Engagement Ring in Platinum

Platinum Twisting Band Solitaire featuring Exceptional Quality 2.5 ctw Diamonds (Profile View)

2.5ct Round Twisting Solitaire Engagement Ring in Platinum Profile View

Hand Selected 2.75 ct Lab Created Diamonds set in Platinum Twisting Band Solitaire Diamond Engagement Ring (Main View)

2.75ct Oval Six Prong Twisting Solitaire Engagement Ring in Platinum

Your Choice of Gold: $1,350 USDPlatinum: $1,600 USD Pricing is for four prong setting only - center stone priced separately. Add a hidden halo for $500 USD. Six prong styles carry an additional fee.

A modern take on a classic cathedral style featuring a twisting shank. 

Twisting Band Solitaire

Twist Solitaire

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 San Francisco, New York, and Austin TX.