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วันอาทิตย์ที่ 16 กันยายน พ.ศ. 2555

The classification 4Cs of diamonds part2/2

Diamond



Carat : To classify the diamond size, it is determined by weight. Of course, a carat is unit measurement of diamond weight.

Carat is the standard to measure the weight of gemstones. If we compare a unit of carat with the standard metric measurement, One carat equal to 0.2 grams (200 milligrams).

Moreover, carat is used to measure the purity of gold as well but writing as karat. The gold weighted 24 karat has as value as 100% pure of gold.
The carat word is taken from carob seed which their attribute are the same weight and shape in every seeds. In ancient times, the ancient people used carob seed to balance scales because no clear standard to measured gemstones in that time, therefore the carat is used as the unit measurement of gemstones.

The table shows the measure weight of the diamond


Color : More colorless of diamond is more valuable. When we think of diamond jewelry, most people will think to its color in white diamond since it can be sparkle and shine the light perfectly.

To classify the colors of diamonds, it can be sorted by D to Z.  Most jewelers refer to GIA’s professional color scale to grade the diamond, the D alphabet is the best quality of diamond as colorless and the flowed alphabets down to Z are less valuable stone respectively. Most people desire the diamond grade D, E, F because it’s most valuable, absolutely exquisite and also rarely to find.

The diamond grade D, E, F have no adulterated color as colorless or whiteness. The other colors moved on a soft ivory color may be represented by G alphabet, moving down the yellow color may represented L, dark color is P through Z which is bright yellow and has been split into color fancy of diamonds.

Please also note that the Fancy color diamonds are not concerning to this valuable rule. They are really more valuable for their color. Some color is very rare and more prize such any color from blue to green to bright yellow.

The table shows the classification of the diamond’s color


To identify the diamond’s color, will separate white and yellow only. For other colors are fancy diamonds which have bright colors for their color.
The reason for splitting out the yellow color because when carbon in the diamond is obtained heat or other chemical components, it will make a difference to color of diamond. 

The yellow diamond has the nitrogen component in it.
Blue diamond may have titanium and steel composed.
Red diamond may cause by chromium.
The pink diamond is sprung from the structure of diamond itself.
The green diamond may cause by obtained some ray.

These procedures above resulted in a fancy diamond with various colors and some kind of them is expensive more than white diamond because rarely find them. However the white diamond still is beloved more than the fancy diamond. At the present, many jewelry industries can improve quality of white diamond in order to create the fancy diamond such as burning method, perfuming method or radiation method. Resulting in a variety of colors such as green color, yellow color, light blue color and so on.

Cut : Most critical of the 4Cs is the cutting procedure because this is the way to reveal three main attributes of diamond jewelry that are sparkle, brilliance and fire.

Diamond jewelries have different shape depended on their cutting but all cutting is for brilliance purpose only. The prize of them up on the amount of light diamond reflects.
How the light disperses in different color of the spectrum, when you move the diamond around the light, the diamond will shine the light back in different colors as the rainbow colors.
 The cutting method is the biggest consequence on how the gemstone catches and its interaction with light. Therefore the beautiful diamond will depend on the diamond jewelry craftsman’s skill in transforming a rough diamond into the exquisite diamond jewelry.




The classification 4Cs of diamonds part1/2

Diamon


Basic knowledge of Diamond

As the diamonds are rare valuable stone and also are self-characteristics, it is very exquisite and this caused most people have the desire to possess them with good quality.

But to choose a valuable diamond with accurate based on the principle, you have to consider several factors of them and this may trouble to you.
In order to selection and purchase the diamond or diamond jewelry by infallible, we have presented how to select the gorgeous diamond for you here.
At first glance, you have to know the 4Cs of diamond. What is the 4Cs? Well, please read the following as hereunder.

The 4Cs of diamond are composed by Clarity, Carat, Color and Cut. The diamond industry used them for grading and classifying diamond quality.

Clarity :  Most diamonds have some inner flaws and the number of them is determined the clarity of this rare valuable gemstone. 

The diamond’s classification is based on the inner purity. According to international standard, this can be classified as follows.

1.Flawless (FL) : The best diamond, this is the most beautiful diamond elite. No marks or blemishes inner and outer of diamond jewelry when viewed under 10x magnification (10X) by diamond loupe.

2 .Internal Flawless (IF) : This is the beautiful diamond. No marks or blemishes inner of the diamond when viewed under 10x magnification.

3.Very Very Small Inclusion (VVS1 / VVS2) : This diamond quality has the level of diamond’s inner impurity as very  very less then visible without 10x magnification by diamond loupe and also quite takes a long time to find its blemishes that depending on the expertise of the examiner . It can be classified into Level1 and Level2 respectively. If there are very little inner blemishes can be used VVS1, more obvious will use VVS2. 

4.Very Small Inclusion (VS1 / VS2) : The impurity level that cannot be seen by the normal eyes. We have to use diamond loupe to examine them with 10x magnification.  However, it takes time less than VVS level to find the inner blemishes. However the flaws can be seen more clearly than diamond’s VVS level and maybe has various colors in the blemish.

5.Small Inclusion (SI1 / SI2) : The diamond level of impurity that can be seen immediately under 10x magnification and some cases can be seen with normal eyes. However the small size may be observed by using white paper lay over and looking up to the light to see clearly. In the eyes of inexpert, may take a long time to notice.

6.Inclusion (I1 / I2 / I3) : The diamond impurity level that can be clearly seen with normal eyes. There are a lot of blemishes which can be observed easily.

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