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Craft Your Unique Story:
From Rough Diamond to Personal Masterpiece

Choosing an engagement ring should be fun, meaningful, and personal. And it’s even more so when you experience Mine to Shine, choosing your own ethically mined rough diamond and following its journey to the ring of your dreams.

We’re here to help. Simply answer a few quick questions so we can guide you.
Let’s start with shape
All Kwiat Tiara Diamonds™ are cut to perfect standards to look bigger and brighter than others of the same carat weight.

Choose your favorite(s) below.
Now, let’s talk size
Kwiat Tiara Diamonds are perfectly cut to look bigger and more brilliant, no matter the carat weight.
Major brilliance at every price
No matter how much you plan to spend, we promise to give you the very best cut diamond with ultimate sparkle and size appearance.
Timing matters
When would you like to propose or receive the ring? This will help us select the best options for your timeline.
The search is on!
Tell us where are you in the process so we can make your experience as efficient as possible.
How did you hear about Kwiat?
Let’s get serious
If you’d like personal assistance, our concierge, Megan, can get in touch. If you’d prefer to learn more about how to choose the most beautiful diamond, we’ll share our exclusive four-part email guide.
Continue your Mine to Shine journey with us
Our Kwiat concierge will be in touch to discuss Mine to Shine in detail, ensuring it aligns perfectly with your preferences.
Share your email for mine to shine details
Be part of something truly unique. Share your email, and we'll send you details about Mine to Shine – a program where your ring will be as one-of-a-kind as your love story.
Diamond Size

Diamond Carat

Carat is often the first thing to come to mind when thinking about a diamond’s size. Size and carat weight are closely related but there are other factors in a diamond’s appearance. Cut and shape also play a role in whether the diamond appears visually larger or smaller than its actual carat weight.

Kwiat Standards

A properly cut diamond will not have too much weight in hidden areas. The added weight increases the cost without giving the diamond a larger appearance. At Kwiat, we cut our diamonds to keep the carat weight in the right places. Each gem has the widest possible diameter to appear larger than other diamonds of comparable carat weight. And because of their superior cut, our diamonds will appear whiter than their GIA color grade. We call this the Kwiat Tiara® Cut.

Kwiat diamonds

  • 5.1 - 5.3mm
    1/2 CARAT
    4.8 - 5.0mm
  • 5.8 - 6.0mm
    3/4 CARAT
    5.6 - 5.8mm
  • 6.4 - 6.6mm
    1 CARAT
    6.2 - 6.4mm
  • 7.4 - 7.6mm
    1 1/2 CARAT
    7.1 - 7.3mm
  • 8.1 - 8.3mm
    2 CARAT
    7.9 - 8.1mm

Other diamonds

Diamond Color and Clarity

Diamond Color

Diamonds are rated on a color scale developed by the GIA, the world’s premier diamond grading nonprofit. The color grading system is based on the alphabet, beginning with the letter D and running all the way through Z. A grade of D is the best possible grade a diamond can receive, which translates to an absence of color. Diamonds with this grade tend to be the most rare and valuable.

Diamond Clarity

Clarity refers to the presence of imperfections, known as inclusions, in the crystal structure of the diamond. Nearly all diamonds contain some sort of inclusion, as they are part of a diamond’s characteristics and structure. An inclusion within a diamond is natural, and on the higher end of the clarity scale, does not take away from its beauty.


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Please note, we are unable to reserve these pieces, so shop now to make them yours.

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Trace the journey from rough stone to polished perfection. Each Kwiat Tiara Diamond®, crafted with unparalleled precision, transforms moments into sparkling, everlasting memories.


Kwiat Round

A whiter, brighter, and larger looking round diamond, cut to the world’s highest standards. Simply brilliant.



This remarkable stone is available in the U.S. only at Kwiat. Its unique faceting pattern gives it a dazzling prismatic effect and makes it appear 30% to 50% larger than other diamonds of the same carat weight.


Fred Leighton Round

We evolved a beloved cut from the 1890s, using modern technology to create consistent dimensions that make the diamond look bigger and brighter. It has all the charm of an antique, and all the precision of a contemporary cut.


Kwiat Cushion

With an elegant, elongated silhouette, perfect outline, beveled edges, and rounded corners, the Kwiat Cushion is a true brilliant cut with more sparkle and fire. And, unlike most cushions, it looks bigger than a round brilliant diamond of the same weight.


Kwiat Oval

Oval diamonds have an elongated silhouette that makes them appear larger than their carat weight. Kwiat Oval surpasses the typical, with a perfect shape, ideal length-to-width ratio, and a unique faceting pattern.


Kwiat Emerald Cut

Popularized during the Art Deco era, the emerald cut has clean lines and parallel step cut facets that create a “hall of mirrors” effect. We improved on the classic to create a modern emerald cut with pure brightness and fire.


Kwiat Radiant

Radiant cuts are for those who love a diamond with a rectangular shape and more sparkle. Kwiat Radiant offers the maximum brilliance, with a unique combination of facets that creates pure brightness throughout the diamond.


Conflict free and ethically
sourced diamonds

Superior quality and

GIA graded and certified

Upgrade your
Kwiat diamond

East-West Kwiat Cushion™ Diamond Engagement Ring with Pavé

“I can’t stop smiling at the sparkle.”

Megan the concierge and her team were so helpful throughout our engagement ring selection process. They explained what made each cut so special and eventually we landed on a Kwiat cushion cut. Not only is it a little bit different from the usual shapes I see, but I can’t stop smiling at the sparkle. It’s just perfect and I couldn’t be happier.


Engagement Ring with Emerald Cut Diamond and Side Stones

“Thank you for making it so easy.”

Megan and the Kwiat family were amazing as I was planning the proposal to my now fiancée. I knew what she wanted (her hints were less than subtle!) but knowing it was being created in NYC where we both met, made it so much more meaningful and I even had the opportunity to get a sneak peek during the process. Thank you for making it so easy.


Starry Night Bracelet with Alternating Diamonds

“She loved it!”

I wanted to gift my wife something after the birth of our first child but wasn’t sure what. As a new dad in the midst of the pandemic, I didn’t want to take any chances, so set up a virtual appointment with Kwiat. I don’t think the experience could have been much better had I been there in person as they had done so much preparation for our call. Making the decision was the hardest part, but I was assured that if she didn’t like it we could return it. That wasn’t something we needed to worry about. She loved it! Thank you Kwiat for always making me look good!



Kwiat is a family business with a heritage of service, quality, and integrity. Guided by these values, Kwiat has flourished, blossoming like the family name, which means “flower” in Polish.

In 1907, Sam Kwiat opened a diamond shop in New York City; he was joined by his son, David, in 1933. Today, Kwiat has grown to become a renowned brand led by David’s son, Lowell, and his grandsons, Greg, Cory, and Russell. Like their forebears, they have perfected the science and art of cutting diamonds. And they continue the tradition of trust and authority that Sam Kwiat established more than a century ago.


As we welcome you into the Kwiat family, we’ll share our knowledge and expertise. We will gladly provide advice that suits your situation and budget, with personal recommendations for the perfect diamond jewelry for any special occasion. We take pride in our name and what it has come to stand for. And we are grateful that customers and their families return to us again and again, generation after generation.



Will you be a classic bride, or are you dreaming of an engagement ring style that’s a bit edgier? Our Kwiat Tiara Diamonds — including the Kwiat Emerald Cut and Fred Leighton Round shown here — are cut to suit any style.

#diamondengagementring #emeraldcutdiamond #oldeuropeancut
Bezel-set bracelets, done two ways. We’d ask you to choose, but they look so good together...

#diamondbracelets #bezelsetting #diamondtennisbracelet
When choosing Mine to Shine, you can expect a luxury bespoke experience, complete with regular video updates of your diamond’s progress that culminate in a complete journey video. Watch here as Nikki’s Kwiat Cushion is transformed into her dream ring featuring a hidden halo and pavé band... and join us in wishing her and Saverio a lifestime of bliss!

#enegagementrings #engagementringideas #engagementringgoals
If your engagement ring is feeling lonely, why not give it some sparkly new right-hand friends? ✨ 

#cushioncutengagementring #cushioncutdiamond #engagementringgoals
Did you know today is National Chocolate Chip Day? We didn’t need an excuse to enjoy a sweet treat... but we’ll take it! 

#diamondring #diamondbracelet #nationalchocolatechipday
Gift your grad something they’ll cherish. A simple diamond pendant is the perfect starter piece for every jewelry collection, and it will be worn for a lifetime.

#diamondpendant #diamondnecklace
Sending love to all the moms and mother figures celebrating this Mother’s Day! 💐

Statement jewelry suggestion for all your spring and summer events. These stunning pear-shaped diamond drops are sure to make you the best-dressed guest! 

#weddingjewelry #diamondearrings #pearshapediamond