Sapphire is as expensive as ruby. If the color, clarity, and cutting are good, the price is very high. A small one often costs tens of thousands of yuan. There are a lot of counterfeit sapphires on the market, so be cautious and buy a sapphire for a small amount of money, which is mostly counterfeit.
Sapphire belongs to the category of jewelry. At the moment, collecting jewelry is very common. In the process of buying and selling, the most important thing is to learn a little bit of identification and identification.
The most common sapphire on the market is glass. In fact, it is relatively easy to identify the glass. The glass is pressed out at a high temperature and shrinks naturally after cooling, and the plane is recessed inward. This dent is not easy to find with the naked eye. It must be magnified by a magnifying glass. When using a magnifying glass, it cannot be linearly focused. It should be focused obliquely. This makes it easy to find concave surfaces, which are usually glass. Of course, the polishing of the gemstone usually achieves a very flat effect. Another method of identification is the wide variety of inclusions in glass. The most common is the bubbles, while the stones have no bubbles. The bubbles in the glass can be found with a 10x magnifying glass.
There is also a synthetic sapphire that acts as a sapphire. The identification method is: look at the texture first, see if the texture of the texture is naturally crystallized, the natural crystal is messy and disordered, and it is usually the real thing. The synthetic sapphire, the crystal is often very orderly, and many synthetic sapphire is clean and flawless, which is usually fake. Because natural gemstones are always somewhat foreign, there is almost no cleanliness. The synthetic sapphire is often glaring, the brilliance is very superficial, and there is no deep sense of natural color. The natural gemstone has high purity and is not glaring, and the brilliance is naturally emitted from the inside out. (Li Feng)
Ferroalloys, generalized ferroalloys, are products that are added to molten iron as a deoxidizer, elemental additive, etc. in steelmaking to provide a characteristic or meet certain requirements. An intermediate alloy of iron and one or more elements, mainly used in steel smelting. In the steel industry, all intermediate alloys for steel making, whether iron or not (such as silicon calcium alloy), are generally referred to as "iron alloys". It is customary to include certain pure metal additives and oxide additives.
Ferro Alloys,Ferro Silicon,Silicon-Barium Alloy,Spheroidizing Agent
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