How to choose a wedding diamond ring There are four "C" principles in diamond selection: cut, color, clarity and carat weight. This is the key to identify the quality and value of diamonds.

incision

Cutting is the only human factor. A skilled diamond cutter can make a good diamond shine, and he can make the internal light reflect to the surface of the diamond to the greatest extent. The cutter must cut symmetrically, just like looking in the mirror.

A good mine may be abandoned because the cutter's skills are not in place. The ideal diamond should be round, with 58 clear cut edges, which can reflect light to the greatest extent. A high-quality diamond has high value, strong reflectivity and good symmetry, but its cutting is not perfect. Cutting an inferior diamond may be too deep or too shallow to make it shine because it wants to retain the maximum weight. Polishing technology will also affect the quality of diamonds. Perfect cut and symmetrical diamonds may reduce their value due to poor polishing.

Colors In some big jewelry stores, some diamonds are displayed for comparison. They arrange diamonds of various color grades in a row to help customers compare, because ordinary customers can't tell the color of diamonds with the naked eye. The color of diamonds is colorless as the top grade, and gradually comes second with the deepening of yellow.

pure

Generally speaking, defects determine the value of diamonds. More precisely, it depends on the impurity content in the drilled ore. Almost every diamond contains impurities, even the best quality diamond.

carat

Carat was once considered as the decisive criterion to measure the value of diamonds. When someone says that he bought a 2-carat diamond, people will find it unbelievable. In fact, the cut, color, purity and weight of a diamond are equally important to its value. The value of a 2-carat diamond with poor cutting technique, yellow color and defects is much lower than that of a perfectly cut, transparent and pure diamond. So the weight of a diamond is not the main factor that determines its value. The weight of a diamond still affects its value. It is important to find out whether the weight of diamonds told by jewelers is accurate. Therefore, when you buy a diamond, ask your jeweler to measure the weight of the diamond on the spot. If the jeweler doesn't want to do this, go to another store.

insertion

Mosaic is also an important part. Bad inlay will cause a lot of trouble and may make the diamond fall off. So when buying a diamond ring, be sure to check whether the bracket is firm and whether the joint with the diamond is thick enough.

shape

Now there are more and more styles on the market, and jewelry designers are constantly innovating. But the more classic styles are round, oval, pearl and square. Generally speaking, the shape of a diamond does not affect its value and quality. On the contrary, it reflects the original shape of the diamond before cutting.

Written explanation

Your diamond must have a certificate of authenticity, which explains the quality, weight and cutting process of the diamond. This is the guarantee for the diamond ring you bought.

Suggestion:

6? 1 Diamonds above 0.20 carat should be selected as far as possible, because only diamonds above 0.20 carat can begin to show the "fire color" of diamonds, and diamonds below 0.20 carat are too small to show the optical effect of diamonds. If you have the ability, you'd better buy diamonds with more than 25 points, and the "fire color" of diamonds with more than 25 points will begin to be obvious.

6? 1 Avoid integer digits, such as 0.30, 0.50, etc. Think carefully when you buy it. Is it worth spending so much money to buy 0.0 Klado? However, you are unlikely to find stones with X8 and X9 scores, because the processor only needs to slightly modify the cutting angle and change it within the standard cutting range, so it can process stones with X8 and X9 scores cut by the extreme standard into diamonds with 30 scores less than the standard cutting, so the number X7 is chosen for insurance. Guide to diamond grading certificate

6? 1 Diamond purchase must be accompanied by a classification certificate.

6? 1 Don't blindly pursue foreign grading certificates. I can say responsibly that the domestic grading standards are stricter than those of foreign countries, especially the definition and color grading. State inspectors and state leaders in Beijing can sometimes reduce the international certificate by 1-2. For example, a customer brought diamonds with GIA certificate classification of 50 points, VVS 1, F color and VeryGood cut, which were identified as 50 points, VS2, H-I color and VeryGood by Beijing XXX Gemstone Testing Center.

Cut back on work.

6? 1 There are two kinds of grading certificates:

1) bulk diamond classification certificate

2) Finished product grading certificate

Although both certificates are graded certificates, they are quite different.

1) weight

6? Diamonds classified as 1 loose diamonds can be accurately weighed with a carat balance.

6? 1 For the classification of finished products, the weight can only be estimated according to the size of the diamond table (because it has been inlaid and the weighed weight is gold+diamonds, so it cannot be weighed), but the estimation is inaccurate after all (influenced by cutting work, the premise of estimation is extremely standard cutting work). If it is a 98-point stone, the mosaic grade is 1 carat, so it is impossible to see that it has written 2 points more, but according to the carat premium, it is written more.

2) clarity

6? 1 rough stone classification means that the classifier can observe the diamond from different angles with a gem microscope, which improves the chance of seeing all the fine inclusions.

6? 1 Diamonds classified by finished products have been embedded in the ring holder, and the classifier can only observe them from the table, and may not see all the inclusions, and sometimes the inclusions of diamonds are just blocked by the metal clips embedded with diamonds, so they can't be seen at all. Diamonds with pinnate (cracked) SI grade can be upgraded to VS or even VVS grade.

3) color

6? 1 When grading a loose diamond, the grader observes the diamond from the table top and the bottom tip, and puts it on the diamond color comparison card for grading. Generally, the color comparison stone is used (just observe the color comparison of the diamond from the bottom tip).

6? 1 The finished graded diamond has been embedded in the ring holder, so it can only be observed on the table. The gold around the diamond will affect the judgment of the grader (the whiteness of the gold is not enough, which will reduce the visibility of the yellow tone of the diamond). The grading of finished products depends entirely on the experience of graders.

4) cutting

6? 1 When grading rough diamonds, graders observe diamonds from all directions, and sometimes use cutting scales for cutting and grading, with high accuracy.

6? The diamond with the finished product classification of 1 has been embedded in the ring holder and can only be observed by the watch. Moreover, the gold around the diamond affects the judgment of the classifier, which makes it impossible to accurately classify the cut (and leads to inaccurate weight estimation). It can be seen that the grading standard of finished diamonds in the national standard is much looser than that of bare diamonds, and the grading of finished diamonds is not very accurate, which mostly depends on the experience of classifiers. Therefore, for the same diamond, the rough diamond classification is SI 1, H-I, 28 points, and the finished product classification with easy cutting may be VS 1(VVS2), G(F), 30 points and verygood cutting.

Suggestion:

6? 1 First of all, don't blindly pursue international certificates. Domestic grading standards are stricter than international ones.

6? 1 Secondly, try to choose the original stone grading certificate. If you must choose the certificate of grading of finished products, please understand that even if your diamonds are of the same grade as the rough diamonds, the actual grade of the finished diamonds will generally be lower than that of the rough diamonds. (That is to say, the actual value of finished graded diamonds is generally lower than the actual value of graded diamonds with the same level of bare diamonds)

Commonly used diamond maintenance methods are as follows:

1, cleaning method of cleaning liquid

Fill a small bowl or teacup with warm water and mix a proper amount of neutral detergent in the water. Soak the diamond in water, brush it gently with a toothbrush, then wrap it with a sieve and rinse it with warm water under the tap. Finally, dry it with a soft cotton-free flannel.

2, cold water immersion method

Soak the diamond in water with a small bowl or teacup for about 30 minutes, then gently brush the diamond in front, back, left and right with a small brush, then shake it in water for a while, then take it out and dry it with a paper towel.

3. Quick cleaning method

Buy a bottle of brand-name jewelry cleaning solution, together with the attached container, and clean the diamonds according to the instructions.

The following are some tips to help you maintain diamonds.

Please don't get chlorine bleach on diamond jewelry when doing housework. Although it will not damage the diamond, it will make the inlay fade or change color.

Don't wear diamonds when washing dishes or doing rough work. Although the diamond is hard, it may be scratched if it is struck hard according to its grain direction.

6. Take your diamond jewelry to the jeweler once a year to check whether the inlay is loose and worn, and then fix and polish it again.

I searched the website and it was really comprehensive. I only know that certificates are very important.