Diamond Shapes

Radiant Cut Diamond

The Original Radiant Cut represents one very special man’s desire to combine the elegant shape of the emerald cut, with the brilliance of the round stone.

After thirty-three years of developing his craftsmanship, Henry Grossbard made his dream a reality he created the first Original Radiant Cut. Invented in 1977, this cut made squares hip again, enabling people to choose the stylish square or rectangular shape without compromising on brilliance.


The Original Radiant Cut Diamond: A “Brilliantized Step Cut”

Invented with the goal of maximizing the beauty of each diamond, only the Original Radiant Cut is cut to Mr. Grossbard’s exacting standards and artistic ideals. Often comparing his work to that of a sculptor, Mr. Grossbard possessed the rare ability to “see into the rough,” and envision his design before the first facet was cut. Backed by three generations of Grossbards, each of our diamonds is cut and evaluated with the same care and attention that the inventor gave to the first Radiant Cut.


The Round Diamond: A Brilliant Cut

With the determination of his immigrant experience, Mr. Grossbard not only envisioned a new cut, but developed a new style of cutting to accomplish his goal. He combined two cutting styles, the type used for round diamonds, and the one used for emerald cuts, into a hybrid “brilliantized step cut.” His creativity resulted in a diamond with the emerald cut shape and the sparkle of the most finely cut round diamond.


The Emerald Diamond: A Step Cut

Before Mr. Grossbard conceived of the Radiant Cut, all diamonds with straight edges, like the emerald cut, were faceted with long rectangular facets. This cutting style, called the “step cut” results in a diamond with a glassy appearance. Diamonds with rounded edges, like round diamonds, pear shapes, ovals, and marquises, are faceted with triangular facets. By creating a technique to combine these two cutting styles, Mr. Grossbard was able to release the natural brilliance of a straight edged diamond.


Original Light Reflections

When Henry Grossbard set out to create the Original Radiant Cut he was obsessed with light. As a craftsman, he fully understood that the beauty of a diamond results from the amount of light that enters it and returns to the eye, as well as the pattern of light reflection within the diamond.

Due to the new hybrid cutting style developed by Mr. Grossbard, the Original Radiant Cut design enables light to enter from many angles. It then reflects light in numerous ways within the diamond, before returning to the eye. For a square or rectangular shaped diamond, this was a revolutionary concept when Mr. Grossbard invented the Radiant Cut back in 1977.

Mr. Grossbard’s style of cutting gives our square and rectangular shaped diamonds an eye-catching “kaleidoscope” look of brilliance with more “points of light” reflected within the diamond than any other cut. Although others have tried to imitate Mr. Grossbard’s techniques, only the Original Radiant Cut is cut to his standards, giving tremendous scintillation and life to every one of our diamonds.


From Square to Rectangular

The Original Radiant Cut design includes a range of contemporary square and rectangular shaped diamonds. We offer our Original Radiant Cuts as square, “squarish,” “rectangularish,” or rectangular. This enables you to find an Original Radiant Cut that works best with a particular jewelry setting, with the shape of your hand, or one that just feels perfect for you.

From square to rectangular, no matter which shape you choose, the Original Radiant Cut will burst with fire and life like no other similar shaped diamond on the market.


Courtesy by Trine Lamm

Bluff diamonds, which are essentially diamonds that appear bigger and better than they actually are, have become quite the new trend.

They are the diamonds to buy when size matters but you will need to be willing to go on compromise with clarity and colour. But there are of course many different kinds of bluff diamonds. So what do you need to look for?

A bluff diamond will normally be SI (Slightly Included) or I (Included) in clarity. Remember, that when grading the diamond, the graders look at how many inclusions the diamond has, but not necessarily at where the inclusions are located. Look carefully at the diamond, you want to find a diamond where you cannot see the inclusions in the middle of the diamond. You don’t want a black spot right under the table facet (the biggest facet on the top of the diamond)

But diamonds graded SI or I can also have some smaller inclusions at the side of the diamond, and this is the diamond you want to buy. The goldsmith can always hide the inclusions when setting the diamond.

The colour of bluff diamonds, are also important. You don’t want a diamond which is too yellow or brownish, but you need to be willing to compromise on the colour of the diamond.  Look for a diamond which is graded J or K in colour, they are normally a little bit yellow, but it is hard to see without a whiter diamond one could use as a comparison to the bluff diamond. And if you set the diamond in yellow gold, it will hide the yellow colour of the diamond.

Another way to get a cheaper diamond, is to compromise on the certificate. Diamonds with a certificate from GIA or HRD tends to be more expensive than diamonds with certificates from IGI or other grading institutes. You will therefore be able to ask for a lower price if the diamond doesn’t have certificate from GIA or HRD. If the diamond doesn’t have a certificate at all, it will be much cheaper, as the quality of the diamond isn’t verified.

Another way to get a cheaper diamond, is to buy a diamond off size. This is essentially a diamond which is just below the magic price jumps, which are 1, 1,5 , 2, 2.5, 3,4,5 carats etc. So if you can find a diamond of 1.8 carats, the price per carat will be lower than the price per carat of a 2 carats diamond.

And finally, diamonds in a fancy shape are cheaper than round brilliants. Normally you will get a fancy shaped diamond 10-15 percent cheaper than a round brilliant cut diamond. Fancy shapes are ovals, marquise, cushion, radiant etc. Don’t go for an emerald cut; it is almost impossible to hide inclusions in an emerald cut diamond.

The “perfect” bluff diamond is a big oval diamond, SI3 in clarity, J colour and of a 1.8 carat, with a good cut. The cut can also make the diamond look bigger than it is; if it is cut wider than normally recommended, it will look bigger than it actually is. Remember that the carat, is the actual weight of the diamond.

When buying bluff diamonds, you need to be critical, but willing to compromise. Look for a beautiful diamond, with sparkle, brilliance and fire. You need to think that the diamond is beautiful, and that you only see the beauty instead of the flaws. Then you will love it forever.



A lab-grown diamond (also known as man-made, lab-created, cultured or cultivated diamond) is created in a controlled laboratory environment as opposed to an underground mine. The process is human-controlled rather than geological.

However, the end-product is a real diamond in every sense. All the physical, chemical, optical and atomic properties of a lab-grown diamond are identical to those of a naturally-mined one. It is also graded by gemological institutes on the 4 Cs used for naturally mined diamonds. Truth be told, it is an impeccable, financially savvy alternative to naturally mined diamonds.

A microscopic diamond seed is set in carbon-rich conditions inside a growth chamber. Using exclusive growth technique, the seed develops into a rough diamond, which is then master-crafted into a lovely, sparkling precious stone.

Human intervention is limited to placing a diamond seed in a conducive, carbon-rich and dust-free environment. Once the growth process starts, nature takes over. Did you know that just like human fingerprints, no two lab-grown diamonds are the same!

These lab-grown diamonds are authentic in every sense. All their physical, chemical, optical and atomic properties are identical to those of naturally-mined diamonds. This is unlike diamond simulants such as moissanites, CZ, YAG, etc., which are not actual diamonds but merely resemble them.

On the other hand, these lab-grown diamonds are 100% reliable and are certified by globally renowned independent gemological institutes. The same institutes that certify naturally-mined diamonds.

No two lab-grown diamonds are identical; in fact, it is impossible to create replicas. Therefore, each diamond is unique and rare.

All diamonds are commonly evaluated on 4 factors: cut, color, clarity and carat. Together, these are popularly known as the 4 Cs.

Cut: The way a diamond has been cut and polished; its symmetry and proportions are completely dependent on human intervention. The cut is a significant factor in determining the gem’s brilliance and value and is arguably the most important criteria to consider while making a selection.

Color: Diamonds come in a range of colors: from colorless to yellow; A diamond is compared to a globally accepted master set to determine its color value. The range spans from the most sought-after colorless, D; to the least desirable color, Z. Deeply saturated hues occur in colored diamonds, the most intense of which are graded as “fancy” and sell for higher prices.

Colorless: Colorless diamonds (shades D to F) are the slowest and most difficult diamonds to grow. Yet, these rare phenomena are the most sought-after. They are followed by the near-colorless (shade G to I), which are relatively faster to grow than the colorless ones. Choose from a range of colorless to near-colorless. Let these pristine, sparkling diamonds bring a twinkle in your eye.

Colors: Fancy Blue, Fancy Pink & Fancy Yellow

Clarity: All diamonds have a few imperfections, both within (inclusions) and on the surface (blemishes). Greater clarity is desirable and leads to higher value.

To arrive at a clarity grade, the size, color, number, relief, nature and position of a diamond are analyzed by qualified gemologists under 10x loupe and microscope. The standard grades of clarity are given below:

FL – Flawless
This grade is given to diamonds that are free from inclusions and blemishes under 10x magnification. Understandably, these are the rarest and costliest.

IF – Internally Flawless
This grade is for diamonds with no inclusions and small blemishes visible under 10x magnification.

VVS-1 – Very, Very Slightly Included 1
This grade covers diamonds with minute inclusions that are very difficult to locate under 10x magnification.

VS1-2 – Very Slightly Included 2
This grade is given to diamonds with minor inclusions that are fairly difficult to locate when examined under 10x magnification.

SI1-2 – Slightly Included
This grade is for diamonds with noticeable inclusions, which are easily visible under 10x magnification.

To make the purchasing process transparent, each diamond that makes its way from the laboratory to your ornament is certified by International Gemological Institute (IGI), a world-class, independent gemological laboratory. IGI is globally recognized for its excellence in diamond grading and identification. Each certificate explicitly mentions the 4Cs of the diamonds, assures full disclosure and guarantees their origin and conflict-free nature.

Besides, each Grown Diamonds certified lab-grown diamond is laser-inscribed with a unique identification number, which matches its respective certificate, on its girdle. Worry not; this number will not diminish the beauty of your gem! It can only be seen under powerful magnification but acts like a safety net for your investment.

Human interaction in creating lab-grown diamonds is limited to the introduction of the diamond seed in the growth chamber and ensuring a dust-free environment. Once the growth chamber is activated, nature takes over the growth process. There are so many factors that affect the final-outcome of the crystal that it is very difficult to control them all and the long growth period adds to the challenge.

Therefore, just like its mined counterpart, each lab-grown diamond is unique. The value of each lab-grown diamond is determined on the evaluation of its 4 Cs.


The rough diamonds are created by scientists, engineers and technicians in safe and controlled laboratories. Thereafter, skilled cutters in state-of the-art polishing facilities transform those roughs into brilliant cut gems. It is ensured that none of the facilities employ child-labor and follow best business practices to reduce their carbon footprint. So, when you purchase a lab grown diamond from NYC Private Jeweler, you are sure that it has been created with fair trade as its core value.


Available in 18k yellow gold or platinum.


Diamonds from NYC Private Jeweler are available in a wide range of conflict-free Fancy colors with IGI Certificate, a world-renowned independent organization, and with laser inscription matching the certificate. Available in a full spectrum of hues, from fancy vivid to fancy light in pink, blue and yellow colors. Sizes ranging from 1.00 carat to 5.00 carats.

However, the end-product is a real diamond in every sense. All the physical, chemical, optical and atomic properties of a lab-grown diamond are identical to those of a naturally-mined one. It is also graded by gemological institutes on the 4 Cs used for naturally mined diamonds. Truth be told, it is an impeccable, financially savvy alternative to naturally mined diamonds.

Security Seal

Upon request, your diamond is sealed in a secure and tamper-proof container. A summary of the IGI Diamond Report is enclosed within the seal and is visible from the back of the seal. Once opened, the IGI Seal will show a chemically generated pattern, evidencing that the seal has been broken.

Laserscribe® provides an easy way to identify your diamond

Your diamond was possibly laser inscribed with the IGI Report number. Diamond laser inscription is the process of using a very fine and precise laser beam to write a report number or even a personalized message on the girdle – the outside circumference – of the diamond.

The Federal Trade Commission (FTC) has expanded its definition of “diamond” to include those grown in a laboratory, as part of several changes to its jewelry guidelines.

The FTC’s previous definition of a diamond stated: “A diamond is a natural mineral consisting essentially of pure carbon crystallized in the isometric system.” This is no longer applicable, the commission said Tuesday. The new listing does not include the word “natural.”

“When the commission first used this definition in 1956, there was only one type of diamond product on the market — natural stones mined from the earth,” the FTC said. “Since then, technological advances have made it possible to create diamonds in a laboratory. These stones have essentially the same optical, physical and chemical properties as mined diamonds. Thus, they are diamonds.”

The fact that diamonds exist “in the soil of [the] earth” is not a necessary attribute, lab-grown producer Diamond Foundry argued after the FTC requested input from members of the trade. The commission agreed.

One should also qualify the word “cultured” when describing man-made stones, the commission added, as the term on its own often leads consumers to believe a diamond is mined. The commission suggests marketers use words such as “man-made,” “lab-grown” or “foundry” to qualify “cultured,” thereby avoiding confusion about a diamond’s origins.

However, marketers should not use the word “synthetic” to qualify “cultured,” the FTC noted, as it creates confusion among consumers, who believe the term indicates a stone is fake or artificial.

The Diamond Producers Association (DPA) declined to comment until it had studied the implications of the new guidelines further. In January, the DPA was one of several trade organizations that collaborated on a universal standard for referring to diamonds, saying that “diamond” on its own implied natural origin.

Courtesy By Rapaport News

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