Every diamond is unique, even two diamonds with the same 4C's grade are not the same and therefore not equally beautiful. This is why Heinrichs Jewellery goes beyond the standard 4C's to help you select a diamond as unique and valuable as your love.


Color Grade

The color grade is the degree to which color is present in a diamond. The less color present in a diamond the rarer it becomes (Fancey color diamonds excluded). A diamond's color is graded in a laboratory against the GIA Color Scale which ranges from D to Z. Grades D-E-F are in the colorless range and are considered the rarest and most valuable. Grades G-H-I-J are in the near colorless range and only a trace amount of color is detectable. Near colorless are considered great value for the price. Heinrichs only lists loose diamonds in the colorless and near colorless range.

Hue Grade

The hue grade is the dominant color which is graded in a diamond. The majority of gem quality diamonds lay within the colorless to yellow spectrum. Some diamonds however, have a different dominant color, usually either brown, grey, green or even a mixed hue. Though most diamond certificates and retailers do not disclose this information, the diamond industry deems this important in establishing value, as these alternate hues are considered less desirable. Therefore, in order to help you make a more informed decision, Heinrichs goes beyond the GIA color grade to also list the hue grade. Here are two GIA certified diamonds. They are both graded by GIA as J in color, but you can see how they differentiate in hue.

* Please note the hue grade is listed as "None" if the diamond is within the regular colorless to yellow spectrum.

0.72ct J-IF GIA Cut EX
Hue Grade: None*
[view GIA certificate]

0.70ct J-VVS2 GIA Cut EX
Hue Grade: Brown
[view GIA certificate]




Clarity Grade

Clarity refers to any internal or external features of a diamond that are visible under 10X magnification. These clarity characteristics help determine a diamonds quality and are often used to establish its identity. Our diamond’s clarity grade is determined in a laboratory using the GIA Clarity Scale. The certified grader takes into account the size, number, position, nature and color of all clarity characteristics before assigning a clarity grade. Heinrichs does not list diamonds below the slightly included (SI) range as inclusions become obvious enough to interfere with a diamond’s beauty.

Black Inclusions

Black Inclusions Black inclusions are black crystals contained within a diamond, and due to their high visibility are considered less desirable. Though not listed on most diamond certificates, nor disclosed by most retailers, it is standard practice within the diamond industry to disclose and evaluate diamonds depending on the degree and severity of black inclusions. Black inclusions are graded as: NONE, SMALL, MEDIUM, LARGE. Below are two GIA certified diamonds. On paper these diamonds seem similar, both are graded by GIA as SI2. Have a look, which diamond would you prefer?
If the diamond industry uses this information in establishing value, should it not also be disclosed to you? This is why Heinrichs goes beyond the GIA clarity grade to also list the black inclusions grade.

0.58ct G-SI2 GIA Cut EX
Black Inclusions: None
[view GIA certificate]

0.50ct G-SI2 GIA Cut EX
Black Inclusions: Large
[view GIA certificate]




Cut Grade

A diamond’s cut grade refers to how well a diamond’s facets interact with light, and is crucial to a diamond’s final beauty and value. A well cut diamond will appear brilliant and full of life, while a poorly cut diamond will appear lifeless. Currently the GIA only assigns a cut grade for round brilliant cut diamonds. Cut is graded as: EXCELLENT, VERY GOOD, GOOD, FAIR, POOR.

Please note the GIA deems the term “IDEAL” as misleading and will not use it in any grading report.





Carat Weight

Carat Weight Carat weight is the standard unit of measurement for diamonds. It is measured in a laboratory using a highly precise electronic scale. 1.00 carat is equal to 0.2 grams. Measurements are rounded to the nearest hundredth of a carat.