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Diamond Certification

At Since1910.com, we understand the importance of the investment you are making in your future. In order to protect our customers, we only sell GIA & AGS certified diamonds. The GIA & AGS are the most stringent diamond grading laboratories, ensuring the value of your purchase and investment.

The gemologists at Since1910.com inspect every single diamond sold and ensure it meets our rigorous standards of quality, brilliance and value.

Since1910.com only sells GIA & AGS certified diamonds. In the jewelry community , the GIA & AGS are considered the most recognized, consistent, and accurate of all grading labs. To verify this, browse any auction catalog from a major auction house to see that the GIA & AGS are the top labs in the categories of six, seven, and eight figure priced diamonds.

Shape and Cutting Style
Definition of the diamond shape.
Measurements
The measurements of the diamond dimensions.
Grading Results – GIA 4CS
Here you'll find the Carat Weight (measured to the closest thousandth of a carat), as well as the Color, Clarity, and Cut grades of the diamond.
Additional Grading Information
Grades for the Finish, comprised of the Polish, Symmetry, and Fluorescence, are graded based on a scale of Poor, Good, Very Good, Excellent.
Grading Charts
This summary of the Color, Clarity, and Cut grading scale helps you remember which grades are optimal.
Reference Diagrams
This diamond diagram shows the diamond's inclusions. They have been marked by the GIA gemologist as they appear from the top (looking through the table) and from the bottom (looking through the pavilion). Note that because the gemologists use pens to mark where the inclusions appear, the actual inclusions may be smaller than the marks.
Shape and Style
Definition of the diamond shape, and the measurements of the diamond dimensions.
Cut, Color, and Clarity
These characteristics are graded on a scale from 0-4, with 0 as the highest grade. The "AGSL 000" or "AGSL triple-zero" is renowned as a diamond with exceptional cut, color, and clarity, and one of the finest diamonds available.
Carat Weight
The weight of the diamond measured to a thousandth of a carat.
Diamond Clarity Plot
This diagram shows the diamond's inclusions. They have been marked by the AGSL gemologist as they appear from the top and from the bottom. Because the gemologists use pens to mark where inclusions appear, the actual inclusions may be smaller than the marks.
Diamond Grading Chart
This summary of the Cut, Color and Clarity grading scale helps you remember which grades are optimal.