Evaluation criteria for GIA diamonds

GIA, the Gemological Institute of America, pioneered the diamond grading system known as the 4C standard,Unified the global standards for diamond quality rating,Become the recognized standard in the industry todayFurthermore, it is of great significance for consumers to accurately understand the quality and characteristics of the selected diamonds.The 4C standard includes: Carat weight, Clarity Color, CutThe diamond quality certification process in various parts of the world has widely adopted the 4C standard up to now.

1. Carat weight • Carat is the unit of weight for diamonds.

•A tool for measuring diamond weight, carob seed → mechanical chain scale → electronic carat scale.• One carat = 100 points = 0.2 grams•The weight of a diamond is recorded to the second decimal place below one carat, and the weight to the third decimal place is not counted. Unless the third decimal place is 0.009, it can be rounded up to 0.01.•Diamond sieves usually use a measuring tape for each disc as the approximate size, and the diameter of each small hole represents each weight of diamond.

2. Clarity • The classification of clarity is based on observing at ten times magnification.

•The clarity of a diamond is its purity and transparency. Clarity characteristics are called inclusions on the inside and gaps on the outside. Factors such as the size, number, location, nature, and distinctness of features determine the clarity grade.•Although most diamonds contain very fine inclusions, these inclusions do not affect the beauty of the diamond itself. However, the fewer and smaller the inclusions, the greater the impact on the penetration of light into the diamond. The lower it is, the more beautiful the diamond will shine.

New Column	New Column	New Column	New Column
	English name	Chinese name	definition
FL	Flawless	Flawless	Flawless inside and out
IF	Internally Flawless	internally flawless	Internally flawless, with extremely minor flaws externally
VVS1	Very Very Slightly Included 1	Very Slightly Contains Level 1	Very slight flaws, difficult to detect
VVS2	Very Very Slightly Included 2	Very Slightly Contains Level 2	Very slight flaws, difficult to detect
VS1	Very Slightly Included 1	Slightly Contains Level 1	Tiny flaws, difficult to observe
VS2	Very Slightly Included 2	Slightly Contains Level 2	Tiny flaws, difficult to observe
SI1	Slightly Included 1	Micro inclusion level 1	Easily detectable obvious flaws, but not visible to the naked eye
SI2	Slightly Included 2	Micro inclusion level 2	Easily detectable obvious flaws, but not visible to the naked eye
I1	Included 1	Contains level one	Obvious flaws, visible to the naked eye
I2	Included 2	Contains secondary	Large and with many flaws, visible to the naked eye, and affecting its brightness
I3	Included 3	Contains three levels	Serious defects, reduced diamond transparency and brightness, the boundary of industrial diamonds

WILLS JEWELLERY Diamond Collection

WILLS JEWELLERY uses the most stringent requirements to select diamonds with color F/G or above and clarity SI-VS or above, and set them in its own jewelry designs to create sparkling and dazzling diamond jewelry. Our store guarantees that every diamond is natural and non-artificial, giving you the greatest confidence.

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3. Color Color grading of diamonds

According to GIA's color grade table, there are 23 grades from D to Z in English letters, ranging from the completely colorless and extremely rare D to the yellowish-brown Z, with different shades of color.•D. E. F. grade belongs to the colorless range, G. H. I belongs to the nearly colorless range, J. K. L is slightly light yellow, and M. N and below are light yellow.In addition to colorless diamonds being valuable, colored diamonds also have very high value.

4. Cutting is the shape and type of a diamond.

The cutting shape of diamonds is usually divided into two categories: round diamonds and fancy diamonds. The most common diamond cut is the brilliant round diamond. Fancy diamonds are also called fancy cuts, which mainly include: cushion-shaped, emerald-shaped, heart-shaped, drop-shaped, princess-shaped, marquise-shaped, oval, and minefield. en form etc.
•Nature gives each rough stone different characteristics. The quality of the finished product is closely related to the original stone and cannot be changed by manpower. However, through the cutting skills of the cutter, its most beautiful side can be presented. Come out and create maximum value.
•The factor that makes a diamond so outstanding depends entirely on its cutting. If the proportion of cutting is good, the diamond can exert its maximum optical properties, showing perfect white light, sparkle, and fire. Flourescence reactionFluorescence reaction refers to the reaction color light that occurs when diamonds are exposed to ultraviolet light. The fluorescence reaction has two main effects on diamonds: 1. Effect on fire - the stronger the fluorescence, the more opaque the diamond will look. 2. Change the color - the same diamond of color H, with moderate fluorescence diamondstone looksRelatively white;On the diamond identification certificate, the fluorescence reaction isTest itemMedium (moderate) fluorescence and above, which has an impact on the price of the diamond. will have an impact.

GIA certified diamonds from WILLS JEWELLERY

What is so special about WILLS JEWELLERY about mounted diamonds? The answer is to deliberately cut the diamonds into pairs during the sanding process at all costs. Many so-called pairs of diamonds are just two diamonds with similar shapes put together; WILLS's pair diamonds allow craftsmen to grind and cut two unpolished raw stone embryos together according to the chosen ideal shape The two diamonds are cut into the same style at all costs, so that they can be called paired diamonds.

Buy diamonds in pairs

WILLS JEWELLERY stocks white and colored diamonds of different shapes, ranging from 30 carats to more than 5 carats. All diamonds are certified by GIA. If you need a quote for GIA diamonds, please fill in the information form below or make a Whatsapp inquiry. Our store will get back to you as soon as possible.