How to identify a diamond from its good or bad, and how to distinguish between good and bad diamonds

It depends on how the color is, whether it is variegated, if it is, it is not a good diamond, if the color is very good, it is pure, it is good.

First of all, look at the light of the diamond

First of all, you need to light up the diamond.

1. Look at the cut (cut): cut refers to the angle of the diamond petal cut by the technician and the proportion of each part of the diamond after the cut, the quality of the cut directly affects the brightness and fire of the diamond, and the diamond that is cut too deep or too shallow will make the light flow away from the bottom or side, losing its brilliance. According to the GIA standard, the cut of diamonds can be divided into five grades: ideal cut (EX), very good cut (VG), good cut (G), average cut (F), and poor cut (P).

2. Look at the color (color): Diamonds can be divided into colorless diamonds and colored diamonds according to color, here we are mainly talking about colorless diamonds, high-quality diamond color should be transparent, and the color should be white. According to the GIA standard, diamonds are graded from highest to lowest in D-Z, D-F for colorless, G-J for near-colorless, and K-M for yellowish.

Among them, H color is the dividing line, and diamonds above H color basically do not feel yellow, but from I-J color, you can faintly feel the yellow hue.

3. Look at the weight (carat): The weight of the diamond is one of the important bases for judging the quality of the diamond, and with the increase of the weight of the diamond, its value increases geometrically. However, diamonds of the same weight will have a very different value due to different colors, clarity and cuts.

4. Look at clarity: Each diamond contains natural inclusions, the number, size, shape and color of these inclusions determine the clarity of a diamond, and diamond inclusions can be called high-quality diamonds with very few inclusions. Diamond clarity can be subdivided into six types: Flawless FL, Internally Flawless IF, Very Slightly Included VVS, Slightly Included VS, Slightly Included SI, and Included I.

Most of the inclusions are not discernible to the naked eye, and the fewer inclusions a diamond has, the more light is refracted and the diamond will be more brilliant.

Ways to distinguish a good diamond from a bad diamond include looking at the diamond's certificate, the diamond's fire, and finding a trusted gem technician.

1. Diamond certificate: When buying diamonds, it is best to choose diamonds with authoritative certificates, such as GIA, IGI, etc. The report provides a detailed record of the diamond's indicators and provides a reliable basis for identification.

2. The fire of diamonds: A good diamond will produce a bright fire and sparkle effect in the light. Observe the sparkle and reflection of a diamond at different angles to understand its optical properties.

3. Trusted gem appraiser: If you buy expensive diamonds, you can ask a professional gem appraiser to do the identification. He claims that they are able to assess the quality and value of diamonds through professional equipment and experience.

The history of diamonds:

As early as around 4000 BC, diamonds were mined and used in India. Diamonds were used as ornaments in ancient times and were often set in jewelry. The ancient Egyptians also had a soft spot for diamonds, which they saw as a symbol of power and wealth.

In the 18th century, large diamond deposits were discovered in Brazil. This has led to a significant increase in diamonds and a corresponding decrease in diamond jewelry, making diamond jewelry affordable for ordinary people.

In 1919, De Beers Diamonds was founded, which launched the famous slogan "Diamonds are eternal" and successfully linked diamonds to marriage and love through advertising and marketing, further boosting diamond sales. With the development of science and technology, the technology of synthetic diamonds has gradually matured. Man-made diamonds are getting closer to natural diamonds in terms of quality and appearance, making them a more affordable option.

To this day, diamonds still enjoy a good reputation in the jewelry lead industry, and are widely used in weddings, jewelry and other fields. At the same time, sustainable diamonds with the goal of protecting the natural environment and avoiding the problem of blood diamonds are also gradually emerging, providing consumers with more choices for loss.

4C grading.

1. color. Color is graded for all diamonds that are nearly colorless in color, excluding fancy coloured diamonds. There are 11 levels of color, from D to N. So the closer the diamond color is to the D grade, the better.

2. Carat, weight. Diamonds are carat premium, and the carat weight of diamonds should be expressed to the second decimal place, and the rule of every nine to one is implemented. For example, when weighing, according to the calculation, and when weighing, according to the calculation.

3. Cut, cut. It's worth noting that the Eight Hearts and Eight Arrows are not the best when you get the table width ratio.

4. clarity. Inclusions visible to the naked eye belong to grade P and below, and those above grade P are determined according to the size, number, and position of inclusions visible under 10x magnification.