Tips on how to read the natural diamond grading report in three minutes.

Mystique Decoding

Source: Natural Diamond Council (NDC)

2022-02-09

Observation 1：Numbers

As shown in above report, the diamond number: 2367061013, the10-digit numbers is equivalent to the proof of the identity of the natural diamond to ensure that it is genuine. Most diamonds will also have the same code engraved on the girdle as the report, which can be seen with a 10x magnifying glass, but some large high-quality natural diamonds may not have it to maintain its perfection.

Observation 2 : Carat

Refers to the weight of natural diamonds, as shown in the attached cert., the carat weight of natural diamonds (Carat Weight): 1.01 carats.

Observation 3 : Clarity

There are different types of inclusions in natural diamonds, such as Crystal, Feather, Cloud, Pinpoint, Needle and so on. The fewer inclusions, the higher the clarity of the natural diamond. The inclusions of each diamond are different, which is the best proof that a diamond is "natural".

Observation 4: Color

Do not mix with "colored diamonds". The color here refers to the colorless degree of a natural diamond. It starts with the letter D, which is the purest, and below that will be gradually yellow in order.

Observation from physical object : D, E, F are colorless, G and H are nearly colorless, and after I and J of more than 50 points, one can observe more obvious yellow with naked eye.

Observation 5: Cut

The main determinant element of the sparkle and brilliance of a natural diamond is Cut.

Good cut can make a natural diamond more brilliant. Cutting is further divided into three sub-categories : cutting ratio, polishing, and symmetry and each sub-categories are ranked by five levels, from high to low, EXCELLENT, VERY GOOD, GOOD, FAIR, POOR.

Key Note 1: Natural diamond table width ratio

The percentage of table width relative to the average diameter directly determines the fire and brilliance of a natural diamond and is critical.

Round diamonds with table width ratios between 53% and 64% are usually reasonable, and diamonds with a small table usually show more fire than a diamond with a large table, but a large table will have better brilliance.

Key Note 2: Fluorescence

Fluorescence refers to the blue-white luster emitted by natural diamonds under ultraviolet light. From None to strong: Faint, Medium, Strong, Very Strong. ).

Key Note 3: Issue date of the certificate

The certificate with the latest issuing date indicate that it is a newly graded diamond. If the issuing date is older, the diamond might have been resold through various hands. Either way it has no effect on the quality of the natural diamond itself.