: Looking at each other with admiration

Seeing Zhang Can's expression, Zhou Nan's aunt was stunned and asked nervously: "Why, this thing is worthless?"

Zhang Can pondered for a while, nodded before answering: "I will explain to you the difference between zircon and diamond. Diamond is the hardest substance in the world. I won't talk about its value. You also understand. Let me talk about zircon. Because diamonds are expensive and valuable, no matter which thing, as long as they are valuable, there will be fakes, fakes, and substitutes will appear. Zircon is the best alternative diamond. In terms of appearance, zircon is the most similar type to diamonds, and pure natural zircons are also

It is not that it is worthless. Natural gem-grade zircon is also called gems. Although it is not as good as diamonds, it also has collection value. However, it can be said that 99% of the substitutes for diamonds in the market are not natural zircons, but artificially synthesized zircons. The written text is called 'cube zirconia', which is called cz in English. The value is lower than natural zircon every day, and it is even more incomparable to diamonds. In order to maximize the value, fakes are usually replaced by this artificial zircon."

This time, Zhang Can explained what Zhou Nan’s aunt and uncle couldn’t bear to say, especially Zhou Nan’s aunt, who was so angry that his hands were trembling and murmured: “I must sue these liars, I must sue them!”

Xie Jiacheng is also not good at sex. The jewelry of his eldest sister-in-law and second sister-in-law are both real. Although they are not particularly valuable and have a little difference from the price they buy, they are both real. There is nothing to say. On the contrary, they are the couple, who were originally the richest families, but they are the ones who make mistakes one after another. This makes him lose face and can only expose his anger on the merchants who sell them!

Only Xie Yong and Zhou Nan were like outsiders, not angry for them, but instead thought Zhang Can was more interesting. The two asked Zhang Can one after another.

"Zhang Can, how is the difference between zircon and diamond?"

"Brother Xiao Zhang, do you want me to bring another basin of water?"

Zhang Can couldn't help but feel funny and waved his hand and said, "You can only measure red sandalwood when you bring water. This zircon cannot be tested with water. This..."

After pondering for a while, he said to Xie Yong: "Okay, you can find a piece of glass, it doesn't need to be too big. Just a small glass mirror for girls!"

"Yes, I have it in my room!"

Xie Yong agreed excitedly, quickly rushed to his house and took a glass mirror as big as a cutting board.

Zhang Can reached out to Zhou Nan's aunt again and said, "Auntie, please use the ring for me!"

Zhou Nan's aunt quickly handed him the diamond ring to him. Zhang Can took it over and did not test it first, but explained with the diamond ring: "Look at it, the difference between diamonds and zircons is actually difficult to distinguish with the naked eye. No matter which aspect, the light, refraction, and observation of the side, the reason why zircons have become a substitute for diamonds is because the similarity is too high and cannot be distinguished with the naked eye. If we want to distinguish whether a diamond is real, I will say a few points. The first point is that zircons are heterogeneous. Looking down from the top of the zircon faceted stone, you can see that the bottom edge has clear double shadows, while the diamond has no double shadows."

As Zhang Can said that, he placed the diamond ring flat on the coffee table and looked down at the light. Zhou Nan leaned over and looked at it, "Huh" said, "Huh, there is really a ghost!"

Several people came here to learn to look like this one after another, and they all looked down from the top of the diamond ring, and they really saw a clear double shadow at the bottom.

Zhang Can also say: "The second point is that this is also the simplest and most practical way to identify. Diamonds are also commonly known as diamonds. They are the hardest of known substances in the world. The Mohist hardness reaches level 10, while the zircon is only at level 8. If it is the most stable, only objects with Mohist hardness of level 9 can be carved. Real diamonds can carve marks, and zircons will not be scratched, and they may also damage themselves. However, in order not to damage my aunt's ring, we do not test with something with a hardness of level 9. The hardness of glass is actually only about 6.5, which is far lower than level 9, but the gap with zircon is not large. If tested with glass, it is easier and more convenient and will not damage zircon. Have you ever seen a knife that scratches glass?"

Almost everyone in the hall nodded. Scraping glass is not cutting-edge technology. Many people have seen it. Ordinary hardware stores have artificial gold, steel and stone scratchers for scratching glass. The hardness of artificial diamonds is slightly lower than that of natural diamonds, that is, natural diamonds are harder, but scratching glass is also easy. With a very crisp sound, a crack was easily cut into the glass, without any effort.

Zhang Can held the diamond ring in his hand, and then used the zircon tip of the diamond ring to scratch the surface of the glass mirror too hard. The unpleasant sound of "crunching" sounded. The glass mirror was scratched and cracked, but the sound was very unpleasant. It was obvious that the diamond scratching glass on the surface of the diamond ring was not so casual.

At this time, everyone was truly convinced by Zhang Can. No matter how beautiful he said, it was better to use facts to prove that what he saw with his own eyes was more effective than saying a thousand beautiful words.

Zhang Can smiled and said, "There is a third point, but most people don't understand this very much. That is the specific gravity. The specific gravity of diamonds is 3.52, while the specific gravity of zircons reaches more than 4.2. Therefore, for diamonds of the same size, the weight of zircons is much larger, but people who are not familiar with diamonds do not understand it, and you can't tell them."

"This is, I don't know anything about diamonds and zircons. If you didn't say so clearly just now, I wouldn't know at all!" Zhou Nan nodded and followed the instructions. Zhang Can just explained in the gold shop that the diamond ring was a broken waste diamond, but he did not mention zircons. So now she said it, she also found it very fresh and interesting. If Zhang Can was a teacher, then she would think that Zhang Can's speech was undoubtedly very successful and attracted them.

The old lady waved her hand and said happily: "Okay, okay, don't look at it. Today is my birthday, and Xiao Zhang is a guest again. Are you not guests? This master must look like a master!"

After sitting down, the Xie brothers had different opinions about Zhang Can. They all sat close to him and asked him questions about antiques. They were not interested in this industry. The old man had never attracted their interest in his whole life, but Zhang Can only took half an hour to attract their whole family.

Xie Jiacheng completely believed Zhang Can’s view of his watch and had decided to go to the specialty store to disassemble and verify it.

Zhou Nan was even more smiling and radiant. Unexpectedly, Zhang Can, who happened to meet by chance, had such good insight. Grandma really liked it, which made grandma happy. It was better than giving her any high-end things. If you want to give good things, do the three uncles even give less?

Judging from the old lady's family, the conditions are obviously quite good. The three brothers of the Xie family all have financial strength. Moreover, Zhou Nan's parents, when they heard them occasionally, seemed to be officials. Maybe they were political managers or real-powerful figures of bureaucracy, otherwise they would not have used that tone. However, Zhou Nan did not have the frivolous and show-off behavior of the lady of the official family or the rich second generation. If she hadn't seen her increase the price in front of her, she would have really not seen that she was a rich man. From this point of view, Zhang Can had a good impression of Zhou Nan.

The old lady doesn't like to waste time in big hotels and restaurants, nor does she like to have a big banquet. On this 80th birthday, she only asks her children to accompany her at home together.

This was something Zhou Nan secretly told Zhang Can. In the next hour or two, Zhou Nan's uncle and second uncle's children came one after another. While calling grandma and giving gifts, the old lady accepted it with a smile.

However, Xie Yong was also secretly telling Zhang Can that although his cousins ​​gave gifts to the old lady, they usually get more from the old lady. The old lady is their guardian and economic backing. When they basically have difficulties and pain, they will not look for their parents, but will come to the old lady. Only grandma is the one they can rely on the most.

After a while, Xie Yong whispered to Zhang Can: "Actually, too, grandma nagged me, but I know she is really good to me!"

The old lady is a very wise and kind elder. From this period of contact and conversation, Zhang Can could feel it.

Several aunts were busy cooking in the kitchen, while several uncles were talking in the living room, all about business matters. Zhou Nan and a cousin, two cousins ​​and one cousin were also laughing. They glanced at Zhang Can from time to time, then talked in Zhou Nan's ear, and then burst into laughter.

Zhou Nan blushed, and Zhang Can knew what they were saying without thinking. It can be seen that although Zhou Nan blushed and didn't argue, it did not mean that she fell in love with her at first sight and fell in love with her. Although she had not been in contact for a long time, Zhang Can seemed to know Zhou Nan naturally.

This girl is actually very noble and arrogant inside. It was just an accidental encounter with her. Maybe because she gave the bracelet to her and she made the old lady happy on her grandmother's birthday, she might have a good impression of herself, but this is definitely not love!

Zhang Can would not blindly think that Zhou Nan fell in love with her at first sight, what kind of identity and level she is, but she understands very well. With Zhou Nan's beauty and identity and family, she is not the person she should like and pursue, or Liu Xiaoqin... When she thinks of this girl, Zhang Can's heart trembles!

Her heart was a little painful. It is undeniable that Liu Xiaoqin is a good girl. She sold her own future and life for her father without hesitation. She was loved and appreciated by Zhang Can, but in her heart, she always felt sorry for her to deceive herself!

Zhang Can didn't think there was anything wrong with such deception at any time in the past, or in the movies and TV shows he saw, and he also felt that he would definitely tolerate and like such deception, but when it really fell on him, he felt that he couldn't stand it!

After drinking a cup of hot tea, Zhang Can stood up and said goodbye to the old lady: "Old man, I won't disturb your family anymore. I still have some things to do!"

"No, boy, you can't leave!"

The old lady waved her hand and refused, and smiled and said, "You are Nannan's friend. Since you have come to me, you are my guest. There is nothing good. I don't like extravagance and waste. My sons all have to go to a big hotel. I don't agree. I think no matter how good you eat, it's better to cook your own food at home. What I want is the atmosphere of reunion for the family. You see, I'm eighty years old and my life is over. The happiest thing is to see my children and grandchildren around my knees!"

Zhang Can turned his head and looked at Zhou Nan again. She smiled and raised her beautiful chin, stretched out a white finger and shook it.

Can't leave!

The old lady suddenly stood up and said to Zhang Can, "Xiao Zhang, come on, come on, come on, come on to the room with me, I want to talk to you for a while!"

"Oh..." Zhang Can was stunned. The old lady's expression was obviously that as long as he went to the room alone, there might be something else to ask him to identify. When Zhang Can thought of something more rare, he became excited again!
Chapter completed!