What are the knowledge points for learning jewelry training courses?

Jewelry training has a targeted description of the current status and development of jewelry market in the country. Through systematic training, the trainees will be the basic jewelry theory and market operation knowledge, laying a good foundation for future personal development.
Jewelry training is a teaching activity provided by those who love jewelry. The training content is the main line written by Professor Yu Xiaoyan of Jewelry of China University of Geosciences, supplemented by diamond grading and jewelry design courses supplemented by the diamond grading and jewelry design courses of internationally renowned institutions.
The ruby ​​appraisal
The natural gemstone "ten red nine cracks", natural ruby ​​with no flaws and cracks is extremely rare. The color of artificial ruby ​​is consistent, with less internal defects or crystalline wraps, clean, and large blocks. As a precious gem, natural rubies with more than 3 carats on the market are very rare. If you encounter a larger ruby, you must attract attention, because natural ruby ​​is thousands of times higher than artificial ruby. "Take medicine".
The natural ruby ​​has a strong "two -color". The so -called two -color, that is, there are two colors of red and orange -red in different directions. Stone or red glass.
The red spinel is very similar to natural ruby. The two are the most confused, so they must be particularly cautious.
[Ruby ingredients]
The ruby ​​refers to the red jade with red colors. It is a type of Gangyu. The main ingredient is alumina (al2O3). 0.1 ~ 3%, the highest is 4%.
In the redness of ruby, the most valuable is the strongest color, which is called the gem of 'pigeon blood', which is very expensive. This kind of bright and strong color that can almost be called the dark red, even more revealing the true face of the ruby. Unfortunately, most of the color of the ruby ​​is pale color and a pink feeling, so ruby ​​with pigeon blood tones is more valuable. In addition, because the ruby ​​is filled with strong anger and strong colors, people used to think that it was the incarnation of the dead bird and had eager fantasies. Natural rubies are not rare in production. High -quality rubies are only produced in Myanmar, and the output is gradually decreasing. Now it can be said that it has almost declined, and large stones will no longer appear.
The evaluation and purchase of ruby. The primary evaluation and purchase factors of ruby ​​are color, followed by weight, transparency and clarity. Generally speaking, the color is pure, the particles are large, transparent, and there are few parcels and defects, and the processing is fine. The proportion of the proportion of the proportion of the face is equal. Myanmar rubies are mostly blood red, uniform, large, large, large, and rare flaws and cracks. Sri Lanka ruby, light color, the main variety is starlight ruby. Thai -spikes of bamboo lines, dark red, are not very bright in color and clean. Ruby is crispy, afraid of knocking and hitting, you should pay attention when we wear it.
A sapphire identification
The color of natural sapphire is often uneven, most of which have straight growth patterns. The color of the artificial sapphire is the same, and its growth pattern is an arc -shaped belt. Often, there are bread dandruff or beaded bubbles in the body.
The natural sapphire also has obvious duality. From one direction, it is blue, and from the other direction, it is blue -green. The color of other gems is different from natural sapphire, which can be distinguished.
It the easiest method can be measured by hardness. Natural sapphire can be engraved on the yellow jade, and other blue gems can be difficult to engrave traces on the yellow jade. As long as there is a piece of yellow jade, sometimes some problems can be solved.