Skip Menu
< Back to Bag

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.


We’re standing by to answer your questions.

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

Enter your email and we’ll send you a list of the items in your shopping bag.

Kwiat Round Engagement Rings


The Most Brilliant Round Diamond in the World

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


View Transcript

My name is Greg Kwiat, and I want to help you learn everything you need to know to buy a diamond.

I’d like to introduce you to the Kwiat Round, the most exceptional round diamond in the world.

Let’s explore what makes the Kwiat Round extraordinary and how we have perfected the art of cutting this classic shape.

Round diamonds are circular in outline and are the most classic and popular of all the diamond shapes. They’re faceted with the brilliant cut pattern, which gives it all of the brilliance, fire, and sparkle that we expect to see in a diamond.

Consistent round diamond shapes first became possible with technology developed in the late 1800s. And as the art and science of diamond cutting evolved over the 20th century, the modern round brilliant became the global standard for diamond brilliance. For generations, they have held their place as the most popular diamond shape for jewelry lovers around the world.

With over 100 years of diamond cutting skill and experience, we have created the Kwiat Round. Perfectly cut, extraordinarily bright, and larger looking for its carat weight. At Kwiat, we have the strictest standards in the world for diamond cut, even stricter than the GIA.

The Kwiat Round is perfectly cut and faceted with excellent polish and excellent symmetry. With our proprietary standards and proportions, Kwiat rounds are simply brilliant, with the optimal balance of fire, brightness, and scintillation. And because of the exceptional cut quality, our rounds will appear bigger in size for a same carat weight. They will appear whiter than their GIA color grade.

To truly understand why the Kwiat round is so exceptional, it helps to compare it to lesser quality rounds that other jewelers cut and sell. All Kwiat round diamonds are excellent cut with excellent polish and excellent symmetry, referred to in the diamond market as triple excellent. Any diamond that falls short of this minimum standard is immediately inferior.

At Kwiat, our standards are even stricter than the GIA’s triple excellent grade. Only a subset of the GIA’s Excellent grading range meets our standards to achieve the Tiara logo. When diamonds fall outside Kwiat’s range, the diamond is either too deep or too shallow or loses brilliance. Diamons that are too deep will look dark, dull, and small for their weight. Diamonds that are too shallow will lose brilliance and have an unattractive, fish eye effect. By comparison, Kwiat round diamonds are always cut to the most exacting proportions and dimensions, and the result is an exceptional diamond that looks bigger and brighter.

At Kwiat, all of our diamonds are cut to our rigorous, technical, and quality standards. With more than 100 years of diamond cutting experience, we make certain that every diamond in every shape is cut to be the most beautiful that it can be. The Kwiat Round is the most beautiful and perfectly cut round diamond in the world.


We laser-inscribe the diamond’s girdle with our Tiara logo, a hallmark of four generations of expertise, craftsmanship, and trust. And today, it means even more: an assurance that our diamonds are natural, conflict-free, and ethically sourced from known origins.


We’ll help you select a natural, conflict-free, and ethically mined rough diamond and invite you to follow along as its cut and set in a handcrafted ring designed to your specifications. Or, you may choose a diamond that’s already been cut or a completed ring.

learn more

Round Choose your rough

Round Cut to perfection



Every Kwiat Tiara diamond is cut from the rough stone by Kwiat and can be traced to its country of origin. This guarantees that the diamond is conflict free and sustainably and ethically mined.


When you choose a Kwiat engagement ring, you are also supporting our contributions to charity: water, an organization that provides clean water to people around the world. Every diamond ring sold provides water for an entire family.


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
This error message is only visible to WordPress admins
Error: There is no connected account for the user 17841400641820361.