Skip Menu
< Back to Bag
MINE TO SHINE
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.

HOW CAN WE HELP?

We’re standing by to answer your questions.

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

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

Kwiat Radiant Engagement Rings

KWIAT RADIANTTM
ENGAGEMENT RINGS

Absolutely Dazzling

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.

A CLOSER LOOK

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 Radiant, the most exceptional radiant-cut diamond in the world. Let’s explore what makes the Kwiat Radiant extraordinary and how we have perfected the art of cutting this classic shape. Radiant cut diamonds are rectangular in shape with cut corners similar to the emerald cut, but different from the emerald cut, they’re faceted with a brilliant cut pattern, which gives the diamond a much greater brilliance and sparkle. Radiant diamonds are perfect for those who love the rectangular shape and want the more traditional brilliance they see and expect in a diamond. When worn in a ring, the rectangular shape can seem to elongate the finger and will often look larger than other shapes. Radiants are one of the newer diamond shapes in the market, originally developed in New York City in the late 1970s. The popularity of the cut has steadily grown over time and continues to have a strong appeal to the modern jewelry lover. With over 100 years With the diamond cutting skill and experience, we have created the Kwiat Radiant, perfectly cut and extraordinarily bright. The Kwiat Radiant is the ideal rectangular shape, not too long and not too short. It has distinctive and elegant cut corners. It is perfectly cut and faceted with excellent polish and excellent symmetry, a rarity in stones of this shape. The Kwiat Radiant has a unique faceting pattern, combining both the Brilliant Cut and Step Cut techniques to give the diamond a true brilliance and maximum sparkle. And because of the precision of this faceting, the Kwiat Radiant is pure brightness and fire throughout the stone, with no bow tie effect, windowing or dark spots, and a size appearance that is larger for its carat weight. To truly understand why the Kwiat that radiant is so exceptional, it helps to compare it to lesser quality radiants that other jewelers cut and sell. There are two primary problems when it comes to subpar radiant cuts. The first is that the shape of many radiants are too short. The second issue is that the a faceting pattern is often poorly done, leading to a bow-tie effect, darkness, or a general lack of proper brilliance. Let’s start with the shape of the diamond itself. The most attractive radiant diamond will be beautifully elongated and properly proportioned. When speaking about the shape of a radiant-cut diamond, we refer to the length to width ratio, which is calculated by dividing the millimeter length of the diamond by its millimeter width. The majority of the radiant-cut diamonds in the market range from square to stubby and are simply less attractive. Length to width ratios under 1.2 typically indicate a stone that is shorter than the ideal shape. The closer the ratio gets to 1.0, the closer the diamond is to a square shape. Square and stubby shapes typically carry excess weight on the underside of the diamond, where it does not add to the visual size appearance, causing it to appear smaller. It’s also important that the corners of the radiant be elegant and properly cut. Radiants without proper corners end up looking more like princess cuts. Dimonds that are outside of the ideal shape range typically sell at discounted prices. By comparison, Kwiat Radiants are always cut to the perfect rectangular shape in very strict length to width range, never too short. And because of this, they always have a larger size appearance for their carat weight. Another major difference between radiant-cut diamonds is the quality of the cut. In diamonds, cut is all about the angles, proportions, and facets. And as with all shapes, the cut quality of a radiant-cut diamond is the critical element that will determine its beauty. When a radiant is well-cut, the diamond will be bright throughout the entire stone and exhibit a great degree of fire and scintillation. Most radiant diamonds in the market are faceted in a very unattractive way, mainly with the goal of saving weight in the cutting process or an attempt to compensate for a general lack of brilliance. Badly-cut radiants typically look small for their size, and they fail to return the maximum light to the eye, leading to a dull or lifeless or windowy appearance. The Kwiat Radiant is perfectly cut with excellent polish and excellent symmetry, and the result is pure brightness and fire throughout the entire diamond, and a diamond that looks larger for its carat weight. 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 Radiant is the most beautiful and perfectly-cut radiant diamond in the world.

THE MARK OF PERFECTION

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.

THE WORLD’S MOST PERSONAL DIAMOND

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

Round CRAFTED FOR YOU

RESPONSIBLE AND TRANSPARENT

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.

GIVING BACK

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.

BUILDING A
BRILLIANT LEGACY

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.

CUSTOMERS ARE FAMILY

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.

SEE OUR HISTORY TIMELINE


A DAILY DOSE OF BRILLIANCE

Popularized in the 1920s and perfected by Kwiat in the 2020s, the emerald cut is a diamond for today, tomorrow, and always. The parallel step-cut facets of our Kwiat Emerald Cut are meticulously designed with ideal proportions to reveal maximum brightness and fire. 

#emeraldcutdiamond
Solitaire pendants are classic and understated, while adding a halo helps create a bigger impact for less. Which look do you love? 

#diamondpendant
Pavé adds an extra pop of sparkle between dazzling ASHOKA diamonds.

#ASHOKAdiamond
Kwiat Tiara Diamonds put the✨special✨in special occasion dressing. 

#onlynaturaldiamonds #ASHOKAdiamond
Natural diamonds + natural light = simply radiant 

#kwiatradiant
Our Kwiat Round diamonds are cut to look bigger and brighter than all others — which means our studs sparkle in every size. Shown here in 2, 4 and 6 ctw.

#diamondstuds
Wrap her in diamond ribbons for a holiday season she’ll never forget. 

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