First, look at the luster
The so-called "pearl treasure", the luster is the soul of the pearl. The pearls of no light and light are lacking in aura. Look at the light, the pearl should be placed flat on a soft white cloth, you can see the warm luster of the pearl overflowing; and looking at the light, the good pearl can see the colorful rainbow light, the level is rich and varied, you can also Seeing a spherical surface like a metal texture, you can even reflect the pupil of a person. A particularly bright one can be listed in Class A, followed by Class B.
Gloss grade quality requirements
Very strong A reflected light is particularly bright, sharp, uniform, surface like a mirror, the image is very clear
Strong B reflected light is bright, sharp, uniform, and the image is very clear
The reflection light in C is bright, and the surface can see the image of the object.
Weak D reflected light is weak, the surface can see the object, but the image is blurred
Second, look at the roundness
"One penny and one penny", "Zhuyuan Yurun", the more round and beautiful the pearl, this is in line with the Chinese people's aesthetic habits. Large particles and round pearls show the beauty of the moon. With the luster, it creates a beautiful artistic conception. The percentage of the longest diameter and the shortest diameter difference of the pearl is ≤1%, the standard is 1%≤the diameter difference ratio is ≤5%, and the circle is between 5% and 10%. But most of the time, you can see the roundness with your own eyes.
Shape rule
Quality requirements (% difference in diameter)
Positive circle A1≤1;
Circle A2 ≤ 5;
Near circle A3≤10;
Ellipse B>10 can have a drop shape, pear shape;
Flat C has symmetry and has one or both sides in a nearly flat shape;
The shape of the profiled D is extremely irregular, usually the surface is not flat, there is no obvious symmetry, and it may be the similarity of the shape of an object;
Third, look at ç‘•ç–µ
The surface acne, spots, marks, pits, and points are as small as possible. Generally, the standard is not acceptable at 0.5 meters away. The standard of Class A is 100% smooth surface, and the naked eye can't see it. Of course, it’s hard to see the flaws in the best of the best in the best of the best.
Finish quality level quality requirements;
Innocent A visually observed surface is smooth and delicate, it is extremely difficult to observe the surface flaws;
The surface of the micro-B has very few flaws, which are pin-like and difficult to observe with the naked eye;
Xiaoyan C has smaller flaws that are easily visible to the naked eye;
ç‘•ç–µDç‘•ç–µ is obvious, accounting for less than a quarter of the surface area;
It is obvious that heavy ç–µE , occupies more than a quarter of the surface area;
Fourth, look at the size
The so-called "seven divided into beads, eight divided into treasure", generally less than 6 mm of pearls are not included in the category of jewelry-grade pearls, 7-9 mm is popular with consumers, 10 mm of pearls have been rare, more than 11 mm Only South Sea pearls and black pearls are available. The higher the number, the less rare the quantity is, and the price tends to multiply. This standard is not difficult to see.
1. The growth time of a pearl:
Nursery: 2.5-3 years ------ pearl motherfish mature;
Growth: 2-3 years or so ------ pearls grow into, about 5mm-7mm;
Among them, the pearl is secreted 3-5 times a day, and the thickness of each secretion is only 0.3μm. The thickness of the nacre for one year is only about 0.3mm. It takes about 3 years to grow to 1mm to grow into a gem. Pearls. In other words, after three years of farming, there are thousands of layers of pearls.
2. In all cultured seawater pearls, only 10%-15% can be used for jewelry, and another 30% can be used as craft jewelry. The remaining 50% can only be used as cosmetics and medicinal.
3, in 1000 beads (just harvested, no pearls are classified as Tongzhu), and finally selected to be a pearl necklace: first-class, about two; second-class, about eight Third-class products, about 15 articles.
4, each kilogram of pearls can be stringed with 22 pearl necklaces; each necklace has a standard length of about 41cm.
5, in the 1,000 beads, the diameter of 7mm or more, round, shiny, feminine, flawless perfect grade pearls, or AAA pearls, sometimes even less than 10; and less The AAB level will not exceed 30-50.
Fifth, look at the color
This depends on personal preferences, skin color, clothing, occasions, and so on. Generally white is the most popular, pure and elegant, black mysterious and noble, pink pure and romantic, golden and graceful.
Six, look to match
Whether it is a string of pearl necklaces, or a combination of gold, silver, diamonds and other gemstones, the harmonious beauty of color, shape, artistic conception, etc., good designers will show emotions and culture through products, and experience and training The pick-and-drop technicians will pick and combine the pearls very well. These are the details that the layman can hardly notice. As a pearlist, as long as there is a certain aesthetic vision and cultural accomplishment, it is possible to see the pros and cons of matching with the pleasing to the eye.
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