There is also a part of artificial gem, which is completely or partially artificially made. There are crystals and amorphous bodies with known counterparts in nature, and their physical and chemical properties are basically the same as those of corresponding natural gems. There is no harm to the human body, but some dyed ones are not necessarily filled. Artificial gem is also a gem, so what you see may be man-made, and many people will misunderstand it because the merchants have not made it clear.
Shopping guide:
1 first of all, we must objectively prevent buying fakes.
Although the GEM is small, it is valuable. A humble gem can sometimes be compared with the price of a color TV, a car or even a Boeing plane. If you buy fake goods, the loss is huge.
In addition to mastering certain theoretical knowledge subjectively and accumulating rich practical experience, it is best to buy fakes in regular exclusive jewelry stores. In order to improve the reputation of enterprises and safeguard the interests of consumers, some domestic jewelry manufacturers and shops take the initiative to provide consulting services for consumers.
2. Carry basic tools for identifying gems.
Even if you go to a state-run store to buy jewelry, you can't take it lightly. In order to improve the accuracy of identification, you must carry the most basic tools, such as magnifying glass and spotlight flashlight. Consumers have no difficulty in carrying these tools.
With the help of a magnifying glass, we can observe the brightness and damage of a gem, thus determining the quality of the gem and identifying the variety of the gem. It is best to use a magnifying glass with a magnification of 10 for gem identification, and it is even better to prepare a magnifying glass with a magnification of 20. You can observe the transparency of gems with a spotlight flashlight.
3. The color of gem is a very important factor.
Gemstones have their own natural colors. Two problems should be paid attention to when observing the color of gems: don't observe the color of gems in transmitted light, and use it as the main color of gems. Also pay attention to the influence of light source and environment on color. For example, the color of ruby cannot be observed under dark brown glass or incandescent lamp. Different crystal sizes will affect the color of gemstones.
Some gemstone crystals are larger and thicker, but after processing, the color of gemstone waste becomes lighter and its value decreases. This often happens when processing raw materials such as aquamarine, amethyst and topaz. There are also some raw materials with strong color and low transparency, which have good color and transparency after processing, such as garnet.
4. Master and judge the value of precious stones.
The value classification principle of waste gemstones is determined by its color, purity, processing and weight. For a given gem, the total quality of the gem is obtained by multiplying the grades of its three quality factors by their respective percentages.
According to the size (weight) and quality grade of the gem, the indicative price of the gem is obtained. For the color of gemstones, the general requirements are that the color should be positive, the light should be exposed, bright, crystal clear and energetic.
The quality of gemstones should be high hardness, good transparency and purity, without impurities, cracks and defects. The workmanship of gem waste should be inspected, fine and beautiful, and the style should be in line with your own wishes. The ratio of the size and price of gemstones is not increased by mathematical series, but by geometric series, with a large span. Size also includes the thickness and size of obsolete sentences.
5. Be extra careful when choosing inlaid gems.
The existence of mosaic frame limits the application of some methods. After the variety is determined, it is necessary to observe whether the gem has undergone some treatment and whether it is an aggregate under high magnification.