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Mine to Shine

1What Will Your Dream Ring Look Like?
Please choose your favorite diamond shapes.

Kwiat Tiara Diamonds™ are cut to perfect standards and absolutely consistent every time. Your Kwiat diamond will always look bigger and brighter than others of the same carat weight.
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2What size diamond would you like?
Kwiat Tiara Diamonds have standard length-to-width ratios, so no matter the carat size you choose, the shape remains consistent.
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3What’s your desired price range?
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4When are you looking to propose/receive the ring?
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5Where are you in the ring shopping process?
Whether you’re just beginning or ready to pop the question, we want to make your search as efficient as possible.
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6How did you hear about our Mine to Shine™ program?
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6Please provide your contact information so our concierge can help bring your dream ring to life.
8How would you like us to contact you?
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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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Homepage – 2022 [new]


We cut our diamonds to look bigger and brighter.
You wear them and look brilliant.




Conflict free and ethically
sourced diamonds

Superior quality and

GIA graded and certified

Upgrade your
Kwiat diamond


ASHOKA® Diamonds

The ASHOKA is a trademarked diamond cut that is as distinctive as it is beautiful. A unique arrangement of 62 facets creates a dazzling prismatic effect, giving the ASHOKA its fiery brilliance.


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 Round

Our exclusive round brilliant diamond exceeds the GIA’s standards, with a superior cut and a diameter that is as wide as possible. The result: a Kwiat Round diamond looks bigger and brighter than others of comparable weight.


Fred Leighton Round

Our perfected version of an old European diamond has a consistent shape, precise dimensions, excellent polish and symmetry, a larger table, and a smaller culet. These considered updates retain the romance of an antique cut while making it look bigger and brighter.


“I can’t stop smiling at the sparkle”

Addison purchased East-West Kwiat Cushion™ Diamond Engagement Ring with Pavé

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.…more


“Thank you for making it so easy.”

Michael purchased Engagement Ring with Emerald Cut Diamond and Side Stones

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.…more


“She loved it!”

Scott purchased Starry Night Bracelet with Alternating Diamonds

“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!”…more



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.



Holiday shopping? If you’re in NYC, visit us on Madison Avenue — we have a few things that might take your mind off this cold weather!

#holidaygifts #necklaceoftheday #onlynaturaldiamonds
This Giving Tuesday, use your individual power of generosity to help support communities around the world. Each Kwiat x charity: water bracelet you purchase will provide clean drinking water for one person in Tanzania. Learn more about charity: water’s mission at the link in bio.
These new Lyric ear cuffs are definitely at the top of our list 🎁📋

#earrings #earringstyle #giftideas
For those days when you don’t feel like putting on your classic engagement ring, double up on eternity bands for a modern look.

#ASHOKAdiamond #enternityband #diamondweddingband
Feeling grateful 🩵 for our amazing Kwiat family, partners and clients, and that we get to do what we love. Happy Thanksgiving!
Now THESE make for a stellar stack ✨
Classic, refined, and holiday ready. These two distinctive earring styles from our Argyle collection are perfect for your next celebration. Drop your choice in the comments!

#sapphirejewelry #earrings #earringstyle