THE WORLDS FINEST


Roy Herzl Inc. offers the largest collection of the finest cut diamonds. Pre-selected for exceptional quality, the cut, color, and clarity of our loose diamonds are evaluated based on a standardized grading scale. Also, each loose diamond is accompanied by a grading report from either GIA or AGSL, independent diamond grading labs with the most stringent grading scales of all labs.

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Roy Herzl QUALITY

We buy & sell the world's finest diamonds
Roy Herzl Inc. is one of the most trusted and widely recognized names in the diamond industry. Located in the Heart of New York's Diamond Center, we are a privately owned company that purchases and sells loose diamonds from all over the world. Roy Herzl Inc. has been conducting business for over 30 years and our experience in liquidating fine diamond jewelry and loose diamonds is unsurpassed.

When you deal with us, your diamond and jewelry pieces will be thoroughly and accurately evaluated by our experienced gemologists. The highest cash value is established. Because we are located in the New York diamond and jewelry center, your items get the greatest exposure to the international market.Learn more about Roy Herzl Inc.

When choosing a diamond that's right for you the "Four C's" should play an integral role in the process.

Various characteristics of diamonds are graded and categorized by the diamond industry. Learning about diamonds is first learning about the "four C's" of diamonds which are considered the most significant grades and categories:

  • Cut
  • Clarity
  • Color
  • Carat weight

These are the criteria jewelers use when grading diamonds, and they're the ones you'll need to understand to buy the right diamond for you. 

Cut:
Cut is presumably the most essential, and most challenging, of the four C's to understand. The brilliance of a diamond depends heavily on its cut.

Primarily, don't confuse diamond "cut" with "shape." Shape refers to the general outward appearance of the diamond, (such as round, cushion, or pear). "Cut" is a reference to the diamond's reflective qualities, not the shape.  Diamond cut is perhaps the most important of the four Cs, so it is important to understand how this quality affects the properties and values of a diamond. A good cut gives a diamond its brilliance, which is that brightness that seems to come from the very heart of a diamond. The angles and finish of any diamond are what determine its ability to handle light, which leads to brilliance.

Clarity:
Most diamonds contain some inner flaws, or inclusions, that develop during the formation process. The visibility, number and size of these inclusions determine what is called the clarity of a diamond. Diamonds that are clear create more brilliance, and thus are more highly prized, and priced. 

Color:
When jewelers speak of a diamond's color, they are usually referring to the presence or absence of color in white diamonds. Color is a result of the composition of the diamond, and it never changes over time.
Because a colorless diamond, like a clear window, allows more light to pass through it than a colored diamond, colorless diamonds emit more sparkle and fire. The formation process of a diamond ensures that only a few, rare diamonds are truly colorless. Thus the whiter a diamond's color, the greater its value. 

Carat Weight: A carat is the unit of weight by which a diamond is measured. Because large diamonds are more rare than small diamonds, they have a greater value per carat; thus, the price of a diamond rises exponentially to its size.

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