How to understand a diamond jewelry grading report: A simple guide for beginners
Surely, buying diamond jewelry is on the wish list of many, it is truly a dream come true kinda exciting experience, but at the same time it can be an overwhelming affair too for beginners when one happens to encounter a diamond jewelry grading report. These reports give one an array of information about the quality, value of the diamond jewelry and its constituents.
In this guide, we will avail detailed information about what a typical diamond jewelry grading report looks like, so you can easily understand the critical information that might influence a buying decision.
What is a Diamond Jewelry Grading Report?
A diamond jewelry grading report, also referred to as a hallmark or a certificate, is an independent laboratory evaluation. It gives detailed information on all the characteristics of the diamond jewelry, particularly those relating to the 4Cs: Cut, Color, Clarity, and Carat weight of the diamond, metals or stones and other precious material used in the jewelry as a whole. These factors are important in deciding the quality and, therefore, the value of the diamond jewelry purchased by the buyer.
There are many organizations that are known to provide grading reports on diamond jewelry. Each institute operates with a strict set of standards to ensure that there is consistency and reliability.
Let us understand the diamond jewelry grading report via an example of a diamond bracelet. If you buy a diamond bracelet & get a diamond jewelry grading report. Here’s what will be in the report and how to understand it as novice buyer
Key Constituents in a Diamond jewelry Report (here diamond bracelet report)
1. Carat Weight
A diamond bracelet is measured in terms of total carat weight. One single grading report of a diamond might give a detail about the carat weight of the stone, but since the piece is in the bracelet, there are more than one diamond. The report will list the total carat weight of all of the diamonds on the bracelet.
Total Carat Weight (TCW): This refers to the total carat weight of all the diamonds in the bracelet. Therefore if you have a diamond tennis bracelet and the report reads that the TCW is 3.00 carats, it means that the actual carat weight of all the diamonds in the bracelet collectively weighs 3 carats.
Individual Carat Weight (optional): In some cases, the report may indicate the carat weight of individual diamonds particularly where the bracelet has one large diamond or pointing out stones.
2. Cut
Cut quality defines brilliance in the diamonds in a bracelet. Mostly, round brilliant cut and princess cut are used, although other cuts may apply. Analyzing diamond cuts, according to their light reflection, the report shows the cut grading for the diamonds in a bracelet as follows.
Cut grading for the diamond in a bracelet ranges from :
- Excellent
- Very good
- Good
- Fair
- Poor
Small well-cut diamonds will reflect lots of light and sparkle wonderfully on your bracelet. Unless you have several diamonds in the same jewelry, you won’t get an evaluation of the cut for each individual stone; the grading report will typically provide a general assessment of the cut quality of all the diamonds.
3. Color
A bracelet’s color grading indicates how colorless its diamonds are. In a grading report for a bracelet, it will show the average color grade of the diamonds used. It runs from D (colorless) to Z (very noticeable yellow or brown tint).
D to F: Because of their rarity and expense, only pure, very colorless, or nearly colorless diamonds fall into this D to F range. High-end bracelets can use only diamonds in this range.
G to J: Slightly less colorless yet still nearly invisible to the naked eye, diamonds at this range are more affordable yet beautiful.
K to M: Having a yellowish color and perhaps even noticeable in a few settings or lighting.
In general, for most diamond bracelets, those in the G to I range fall under the commonly used diamond classification, with great value for an impressive appearance.
4. Clarity
The clarity grade scrutinizes the existence of inclusions (internal flaws) and blemishes (external flaws) of the diamonds. It should provide an average overall clarity grade for the diamonds in the bracelet, which would give an idea of the quality of the stones under scrutiny.
Clarity grades encompass:
Flawless (FL) and Internally Flawless (IF): Extremely rare, without even the slightest presence of inclusion when viewed under 10x magnification.
VVS1 and VVS2 Very Very Slightly Included Inclusions are almost impossible to detect without magnification.
VS1 and VS2 Very Slightly Included Inclusions are slight, challenging to notice even under magnification.
SI1 and SI2 Slightly Included Inclusions noticeable with a magnifying glass, though most are not visible to the naked eye.
I1, I2, I3 Included: Inclusions that are clearly visible under a microscope, which may impact the appearance of the diamonds.
For a diamond bracelet, clarity grades of VS or SI are often ideal because the diamonds are typically small and inclusions are less noticeable.
5. Diamond Shape
The grading report will also list the diamond shape used in the bracelet. Popular shapes for diamond bracelets include:
Round Brilliant Cut: It is considered the most popular and brilliant shape, commonly used in tennis bracelets.
Princess Cut: It is square in shape with great sparkle, often used in current bracelets.
Cushion Cut, Emerald Cut, Oval Cut, and others can also be applied for a more unique look.
The report shall define the type of each shape used in case the bracelet has a mix of them.
6. Polish and Symmetry
Polish refers to the surface smoothness of the diamond whereas the symmetry describes the alignment of facets on the diamond. Both polish and symmetry have the ability to influence the way in which a diamond is able to reflect light and, also in how it may potentially look in general.
Polish Grades: Ex, VG, Good, Fair, Poor.
Symmetry Grades: Ex, VG, Good, Fair, Poor.
Brilliant diamonds reflect light more when well-polished and symmetrical. The report often includes an average rating for polish and symmetry.
7. Fluorescence
Most diamonds fluoresce under ultraviolet (UV) light causing it to glow. The grading report comments on the presence and strength of fluorescence, which ranges from None to Very Strong.
While fluorescence tends to have little or no influence on the look of the diamonds in a bracelet, Strong or Very Strong fluorescence may sometimes make the diamonds appear fuzzy or cloudy, not as beautiful.
8. Metal Type and Setting
While the main focus of a diamond grading report is on the diamonds, information about the metal used for making the bracelet might also show in some of the reports. This may include the following details:
Type of metal: Examples include platinum, white gold, yellow gold, and rose gold.
Setting style: The fashion in which the diamonds are mounted to the bracelet, including prong, bezel and channel setting, impacting the general design, security, and light reflection from the diamonds.
9. Total Measurements and Total Diamond Weight
Some reports will include information in general measurements about the bracelet, for instance, how long it is, how wide, and the total weight for size and proportion checks.
Other Information That Might Be Included
Laser Engraving : If the diamonds, for a bracelet for example, are laser engraved with an identification number unique to that diamond, this will be noted on the grading report. This feature serves to identify the diamonds and raises security.
Plot Diagram: Depending on the size of the diamonds, a plot diagram may be included as part of the report. For bracelets with large stones, it may give a map of the disposition of inclusions or blemishes in the diamonds.
Why Does a Diamond Jewelry Grading Report Matters?
A diamond jewelry grading report will give you a clear objective analysis of the quality of the diamonds used in your jewelry. It would enable you to:
Confirm the quality of the diamond according to the standard grading.
Compare various jewelry, total carat weight, cut, and clarity.
Authenticity, especially in a case of high-value jewelry.
Before buying diamond jewelry, ask a reputable gemological laboratory for its grading report since it makes sure that you get unbiased judgment about the quality of your diamond jewelry, hence justifying the worthiness of any investment made in terms of beauty and value.
For more such insights and updates visit our blog section on usgl.us/