Seeing Zhang Can's expression, Zhou Nan's little aunt was stunned, and asked a little nervously, "What, this thing is worthless?" ”

Zhang Can pondered for a while, nodded and replied: "Let me first 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, I'll talk about zircon, because diamonds are precious and valuable, no matter what kind of thing, as long as it is valuable, there will be fakes, fakes, substitutes will appear, zircon is the best alternative to diamonds, in appearance, zircon is the most similar to diamonds, pure natural zircon is not worthless, Natural gem-quality zircon is also known as gemstone, although not as good as diamond, but also has a collection value, and in the market to replace the diamond substitutes, it can be said that 99% are not natural zircon, but a synthetic zircon, the written text is called 'cubic zirconia', the English abbreviation CZ, the value is lower than natural zircon every day, and diamonds are even more incomparable, in order to maximize the value, the fake is usually replaced by this artificial zircon. ”

This time, Zhang Can's explanation made Zhou Nan's aunt and uncle unbearable, especially Zhou Nan's aunt, who was so angry that her hands trembled, and she muttered in her mouth: "These liars, I must sue them, sue!" ”

Xie Jiacheng is also not colorful, the jewelry of the eldest sister-in-law and the second sister-in-law are real, although they are not particularly valuable, and there is a gap between the purchase price, but they are all true, there is nothing to say, but the two of them are husband and wife, who were originally the richest families, but they were the ones who went on a series of ugly business trips, which made him lose face at all, and he could only spill his anger on the businessmen who sold them!

Only Xie Yong and Zhou Nan were outsiders, and they didn't feel angry for them, but they thought that Zhang Can's side was more interesting, and the two asked Zhang Can one after another.

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

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

Zhang Can couldn't help but laugh, waved his hand and said: "You can only test rosewood with water, and you can't test this zircon with water, this ......"

After a deep groan, he said to Xie Yong: "Okay, you find a piece of glass, it doesn't need to be too big, the small glass mirror used by girls can be!" ”

"Yes, I have it in my room!"

Xie Yong excitedly agreed, and quickly got up and went to his house to get a glass mirror the size of a cutting board.

Zhang Can stretched out his hand to Zhou Nan's aunt again and said, "Auntie, please give me the ring to use!" ”

Zhou Nan's aunt hurriedly handed him the diamond ring, Zhang Can took it, did not test it first, but took the diamond ring and explained: "You see, the difference between diamond and zircon, in fact, this gap is difficult to distinguish with the naked eye, no matter what aspect of visual inspection, light, refraction, observation of the side, zircon has become a substitute for diamond, is because the similarity is too high, the naked eye can not distinguish, if we want to distinguish whether a diamond is real, there are a few points I will say, the first point, zircon is a heterogeneous body, Looking down from the top of a zircon faceted stone, you can see that the bottom face has a clear double shadow, while the diamond does not. ”

Zhang Can said that he put the diamond ring flat on the coffee table, and then looked down at the light, Zhou Nan leaned his head over and looked at it, "Huh" and said, "Hey, there is really a ghost!" ”

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

Zhang Can said: "The second point, this is also the simplest and most practical way to identify, diamond, also commonly known as diamond, is the hardest known substance in the world, Mohs hardness reaches grade ten, and zircon's hardness is only grade eight, to be the most stable, only take the Mohs hardness of the nine-grade object to carve, the real diamond can carve out traces, and zircon can not be scratched, and it is possible to damage oneself, but we here in order not to damage the aunt's ring, so we do not take the hardness of the nine-grade thing to test, The hardness of glass is actually only about 6.5, far below the ninth grade, but the gap with zircon is not the top, if you use glass to test, it is easier and more convenient, and will not damage zircon, have you ever seen a knife that cuts glass? ”

Almost all the people in the hall nodded, scratching glass is not cutting-edge technology, many people have seen it, ordinary hardware stores have artificial diamond scratching knives for scratching glass, the hardness of synthetic diamond is slightly lower than that of natural diamonds, that is, the hardness of natural diamonds, but it is also easy to scratch glass, with a scratch inlaid with synthetic diamond on the glass, a very crisp sound, the glass is light and is scratched out of a trace, effortlessly.

Zhang Can took the diamond ring in his hand, and then used the zircon tip of the diamond ring to scratch the surface of the glass mirror not too hard, the ugly sound of "crunch" sounded, the glass mirror was scratched and cracked, but the sound was very ugly, and it was obvious that the diamond on the surface of the diamond ring was not so arbitrary.

At this time, everyone was really convinced of Zhang Can, no matter how beautiful the words were, it was better to prove them with facts, what they saw with their own eyes was more effective than saying a thousand beautiful words.

Zhang Can smiled and said: "There is a third point, but this point is not very well understood by ordinary people, that is, the specific gravity of diamonds, the specific gravity of diamonds is 3.52, and the specific gravity of zircon is more than 4.2, so the weight of diamonds and zircons of the same size is much larger, but people who are not familiar with diamonds do not understand, and you can't tell him." ”

"Yes, I don't know anything about diamonds and zircon, and if you hadn't just said it so clearly, I wouldn't know anything at all!" Zhou Nan nodded and followed suit, in the gold shop, Zhang Can only explained that the diamond of the diamond ring was a cut waste diamond, but did not mention zircon, so now that she said it, she also felt extremely fresh and interesting, if Zhang Can was a teacher, then she would feel that Zhang Can was undoubtedly very successful in his speech, which attracted them.

The old lady waved her hand and said happily: "Okay, okay, don't look at it, today is my birthday, Xiao Zhang is a guest again, you are not a guest, right?" This master has to be like a master! ”

After sitting down again, the Xie brothers had a different vision of Zhang Can, and they all sat close to him and asked him questions about antiques, originally they were not interested in this business, and the old man had not aroused their interest after playing all his life, but Zhang Can only spent half an hour attracting their family.

And Xie Jiacheng completely believed Zhang Can's opinion of his watch, and decided to go to the store to open it for verification.

Zhou Nan was even more radiant with a smile, I didn't expect that this Zhang Can who I met by chance had a good insight, and my grandmother really liked it, which made my grandmother happy, this is better than giving her any high-end things, if you want to send good things, the three uncles will give less?

Looking at the old lady's family, it is obvious that the conditions are quite good, the three brothers of the Xie family all have economic strength, and Zhou Nan's parents, listening to their accidental words, still seem to be what kind of officials, I don't know what kind of management, what kind of bureau of real power figures, otherwise I wouldn't use that tone, but Zhou Nan didn't have the slightest official lady, or the frivolous and show-off behavior of the rich second generation, if it weren't for her asking for the gold bracelet in front of her, I really can't tell that she is a rich person, from this point of view, Zhang Can has a good impression of Zhou Nan.

The old lady doesn't like to go to the big hotel to waste it, and she doesn't like to put on a banquet, and on her 80th birthday, she only asks her children to accompany her at home.

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

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

Xie Yong was after a while, and then whispered to Zhang Can: "Actually, I am too, grandma nagged me, but I know that she is really good to me!" ”

The old lady is a very wise and kind elder, and Zhang Can can feel it from this contact and conversation.

Several aunts were busy cooking in the kitchen, several uncles were talking in the living room, talking about business, Zhou Nan and a cousin, two cousins and a cousin were also giggling and laughing, they glanced at Zhang Can from time to time, and then said in Zhou Nan's ear, followed by a burst of laughter.

Zhou Nan blushed, Zhang Can didn't have to think about it to know what they were talking about, it could be seen that although Zhou Nan blushed, she didn't argue about anything, but this didn't mean that she fell in love with herself at first sight and liked herself, although the contact time was not long, Zhang Can seemed to understand Zhou Nan naturally.

This girl, in fact, is very arrogant and arrogant in her heart, she and her are just an accidental encounter, maybe because she gave her the bracelet, and made the old lady's birthday happy at her grandmother's house, so she may have a good impression of herself, but this is by no means love!

Zhang Can will not be blind enough to think that Zhou Nan fell in love with him at first sight, what is his identity and what level, but he understands very well, with Zhou Nan's beauty and family, she is not the person she should like and pursue, or Liu Xiaoqin...... When he thought of this girl, Zhang Can's heart trembled!

There is a little pain in my heart, it is undeniable that Liu Xiaoqin is a good girl, she sold her own future and life for her father, without hesitation, this filial piety and courage are what Zhang Can likes and appreciates, but in the bottom of her heart, she always feels painful that she deceived herself!

This kind of deception, at any time before, or in the movies and television he saw, Zhang Can didn't feel anything wrong, and he felt that he would definitely tolerate and like this kind of deception, but when it really fell on him, he felt that he couldn't bear it!

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

"No, young man, you can't go!"

The old lady waved her hand, refused a mouthful, and said with a smile: "You are a friend of Nannan, since you came to me, it is my guest, there is nothing good, I don't like extravagance and waste, my sons are going to the big hotel, I don't agree, I think no matter how good the food is, it is better to make a casual meal at home, what I want is the atmosphere of family reunion, you see that I am eighty years old, and my life is over, and it is the happiest thing to see my children and grandchildren around my knees!" ”

Zhang Can turned her head to look at Zhou Nan again, she smiled and raised her good-looking chin, stretched out a white finger and shook it.

Can't go!

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

"Oh......" Zhang Can was stunned, the old lady's expression, obviously as long as he went to the room alone, there might be some treasures for him to identify, thinking that there might be more rare things, Zhang Can became excited again!