Yan Juan rejected Lu Wenjun's "kindness", although the salary he offered was three times more than what she got now, but for her, Yan Yixin not only had the grace of knowing her, but also had a more subtle emotion in it.

Even though he was the closest person in his previous life, once he saw the true face of the person in front of him, Yan Juan found that he didn't have much jealousy and hatred for his flower name. It seems that he has become a cold-eyed bystander outside the parties.

Standing at the counter of Yan's store, looking at the customers who walked in, Yan Juan was always uneasy, and the smile on his face was all mechanical.

When I was having dinner, I didn't see Yan Yixin. At this time, looking at the willows on the moon and thinking with his toes, he also knew that Yan Yixin must have gone to that "cave".

"Yan Xuan, it's time for your class, why don't you leave?" Lu Xiang's crisp voice woke up Yan Xuan, who was in a fugue of being too void.

When I raised my wrist and looked at my watch, it was already seven o'clock and fifteen minutes. And he was still thinking about the layout of the cave, and almost every detail could be re-carved in his head.

"Oh, I'll leave now." Yan Juan changed out of her work clothes and hesitated for a while at the subway station at the door, at this moment, she had an urge to see Yan Yixin. Even if it were one more Brazilian night, she would be happy.

Clenched his fist hard, Yan Wan restrained himself. She's not one of his, and now she can't share the joys and sorrows, right......

But until she sat in the classroom, she was still uneasy.

"The turn-over style in gem cuts, whether round, oval, pear-shaped, marquise-shaped, heart-shaped...... All have a common feature, that is, the surface is composed of several facets with a certain geometric shape. This style is suitable for processing all kinds of transparent gemstones, especially diamonds that we are all familiar with. ”

Pang Zhengde's voice, in Yan Xuan's ears, seemed to be drifting, and it took twice as long as usual to understand the meaning of his words.

"Yan Xuan, let's talk about the most famous round polyhedron type, and some basic information about it." Pang Zhengde stared at his proud disciple, which made Yan Juan take aback and stand up instinctively.

"Round polyhedral?" She subconsciously asked a rhetorical question, and then sorted out her thoughts, "This is the style that Marshall set in 1914 after using the principle of optics and scientific calculations, in which the processing size and proportion, as well as the angle of each part, have quite mature standards, which maximize the fire and brilliance of the diamond, so it is also called round diamond type." Its height is generally 59.3 percent of its diameter. On this basis, several shapes such as European and Scandinavian were derived, which still maintained fifty-seven or fifty-eight facets. ”

"Good." Pang Zhengde expressed his satisfaction with her answer, "Yan Juan is right, this round and multifaceted shape is the most widely used cut in the current diamond cutting. Most of our jewelry stores use this kind of cut, on the one hand, you can use as much fire as possible to disguise the imperfections of the diamond itself. On the other hand, this cut is the most material-efficient compared to other cuts. ”

Most of the students had contact with diamonds, and at this time, many people suddenly realized that it was no wonder that their counters had never seen other cuts!

"Yan Juan, do you still have questions?" Pang Zhengde seemed to be staring at her today, and Yan Wan made a little mistake, and he was caught by him.

"Uh......" Yan Juan blinked, casually grasping a doubt, "Pear shape and princess Fang can still be seen in some jewelry stores, I heard that there are also rose shapes, but ......." ”

Pang Zhengde smiled and nodded with satisfaction, as if he didn't notice Yan Xuan's continued distraction.

"The rosette has been formed since the 16th century, and if the upper surface of a gemstone is surrounded by continuous triangular facets, we call it a single rose. If the upper and lower surfaces are of this shape, we call it a double rose type. This shape later developed a variety of shapes, such as Dutch roses, pear-shaped roses, teardrop-shaped roses, three-sided roses, etc., and reached its peak in the eighteenth century. However, because the optical effect of the rose type is relatively poor, almost no designer will use this shape to this day. ”

Yan Juan actually doesn't really want to get to the bottom of it, her heart is tied to Yan Yixin's body! I don't know what he will look like tonight! Thinking of the fierce and vicious appearance that day, Yan Juan actually felt that even so, it was much more pleasing to the eye than the oily Lu Wenjun.

When Pang Zhengde opened a small stove for Yan Juan, he successively talked about several novel examples of the flip-up type.

"This cut is asymmetrical?" Yan Juan sensitively pointed out Pang Zhengde's sketch. Could it be a clerical error on his part?

"Yes, it's a flat, unpaired flip style. From an optical point of view, every ray of light that hits a diamond is reflected through two small faces diagonally opposite each other, and the spectrum of light reflected from the inside of the crystal is wider. After research, this light is also more acceptable to the human eye. Because, compared with the traditional style, this small-sided unpaired style has stronger brightness and fire, and it will also look more beautiful. ”

Yan Wan nodded again and again, looking at the several shapes drawn by Pang Zhengde casually, he was silent.

"Of course, no matter what kind of cut it is, you still have to consider the shape of the blank itself, and try to leave a little more weight. Everyone knows that the bigger the diamond, the more room it has to appreciate. ”

Pang Zhengde is very satisfied with this kind of teaching and learning, and he is also happy to meet such a tireless student as a teacher.

But Yan Juan felt that this class was a little absent-minded. finally heard Pang Zhengde's kindness, and he hurriedly stood up and packed up his notebook.

"Yan Xuan, will it be inconvenient for you to go back alone at night?" Pang Zhengde looked at her beautiful face and suddenly asked with concern.

"Huh? No, it won't. Yan Juan hurriedly perfunctory.

From the first time Pang Zhengde opened a small stove for herself, she had a special "coachman". It's just that he can't come today.

Walking out of the door of the training class, the evening breeze of spring, with a bit of gloom, made Yan Juan sneeze. Standing alone at the bus stop, Yan Juan suddenly wanted to get closer to Yan Yixin, even if he didn't know it.

PS: Thanks to the angel who fell into the water for the tip! Every pro support, the little pig will be very grateful, and there will be a more in the evening, thank you!