WILLS JEWELLERY is a Hong Kong local brand jewelry and gemstone specialty store that specializes in providing customers with exquisitely designed and value-for-money jewelry. As natural gemstone experts, the WILLS JEWELLERY team has more than ten years of experience in gem procurement. All gemstones are purchased directly from the place of origin. After careful internal identification procedures, they ensure that they meet the most stringent requirements of the brand. Finally, they are handed over to international certification agencies for scientific testing of gemstones. Authentication. In addition to the professional purchasing team, WILLS JEWELLERY's jewelry design team is always carving and painting all kinds of jewelry for customers. Whether it is our own design or the WILLS Tailor Made service, our designers will do their best to serve our customers, combining traditional top-notch jewelry craftsmanship to create your own unique and moving story, evoking your most profound memories.
Evaluation criteria of WILLS DIAMOND GIA diamonds '4C'
GIA Gemological Institute of America pioneered the diamond grading system, called the 4C standard. Unified the global grading criteria for diamond quality, and became the recognized identification standard in the industry today; It also allows consumers to accurately understand the quality and characteristics of the diamonds they purchase, which is of great significance.
4C standards include: Carat weight, Clarity, Color, Cut; today, 4C has been widely used in diamond quality certification processes around the world standard.
4C standards include: Carat weight, Clarity, Color, Cut; today, 4C has been widely used in diamond quality certification processes around the world standard.
1.Carat Weight•Carat is the unit of weight for diamonds.
- A tool for measuring the weight of diamonds, 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 of less than one carat, and the weight of the diamond is not counted until the third decimal place. Unless the third decimal place is 0.009, it can be rounded up to 0.01.
- Diamond sieves usually use a measuring tape of each disc as the approximate size, and the diameter of each small hole represents each weight of diamond.
2.Clarity• The classification of clarity grades is based on observation under 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.
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|
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 |
3.Color 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 colorlessrange
D. E. F. grade belongs to the colorlessrange
G . H . I Belongs to the nearly colorless range
J. K. L is a pale yellow color
M. N and below are light yellow.
In addition to colorless diamonds being valuable, colored diamonds are also very valuable.
4.Cut•Cut is the shape and style of a diamond
Diamond cutting shapes are 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 brought out and Create maximum value.
- What makes a diamond so outstanding depends entirely on its cutting. If it is cut in good proportions, the diamond can exert its maximum optical properties, showing perfect white light, sparkle, and fire.
Other relevant standards:
Fluorescence reaction
Fluorescence refers to the reaction color light that occurs when a diamond is exposed to ultraviolet light.
Fluorescence has two main effects on diamonds:
Fluorescence refers to the reaction color light that occurs when a diamond is exposed to ultraviolet light.
Fluorescence has two main effects on diamonds:
1. The influence of firelight - the stronger the fluorescence, the more opaque the diamond appears.
2. Change the color - the same diamond of color H, with moderate fluorescenceDiamond
stone lookrelatively white;On the diamond grading certificate, the fluorescence reaction isTest items
Only fluorescence of medium intensity or higher will affect the price of a diamond.
