As for the shortcomings of sapphire, personally, sapphire always likes to soar, which is not good for its service life, but compared with other brands of A card, I would still recommend sapphire and Dylan Hengjin.
As for the price, it is at least more expensive than the branded goods 100, and the price difference of high-end cards is even greater. The price of online newspaper is only more expensive than that of branded goods 100, but as long as the price is cut, most branded goods can be cheaper than 50%!
Question 2: How to distinguish between good and bad sapphires? Identification method of sapphire
1. hardness method
Cubic zirconia engraved sapphire edge to be measured. The rower is sapphire, but the rower is not sapphire. Use this method carefully.
2. Multi-color image method
Sapphire is characterized by double rainbows with small width and partial overlap. Another feature is strong dichroism (blue-green or blue-green). Only sapphire has these two characteristics.
3. Growth of banded inclusions
Hexagonal growth lines (including parallel growth lines and 120 degree bending growth lines) are the remarkable characteristics of sapphires, but not every sapphire has obvious growth lines. Filamentous rutile inclusion is a sign of natural origin, but it is not unique to sapphire. So these two items are only auxiliary judgment marks. Good luck.
Question 3: What is the quality of sapphire graphics card? I won't tell you which one. I'll give you a way to analyze it yourself. There are many demands on the internet now.
First of all, I worked as a hardware in the computer city for 9 years. My evaluation of graphics cards and CPU is quite professional, and the software is very fake. How can I put it? For example, some graphics cards have special optimization for some running software, such as two graphics cards with the same performance. If they run down with different running software, they may get two different results. Remember, I will give you 3 points. Whether the graphics card is good or not, you will understand later. First of all, look at the GPU chip, which determines the grade of the graphics card and the speed of data processing. You can think of it as the CPU in the graphics card. Second, look at the bandwidth, that is, bit width x existing frequency = bandwidth, and the function is to transmit the data processed by the graphics card. The bit width depends on how wide your expressway is, and the average memory rate is how fast your car can drive and the speed of the total traffic. Third, look at the stream processor. The stream processor of A card is three times that of N card, and their performance is the same. The role of the stream processor is to see the quality and rendering effect.
The first three points are the most important. Finally, the most useless thing is the size of the memory. Generally, high bandwidth video memory must be large, but the bandwidth of video memory is not necessarily large. The role of video memory is only used when players are playing games and processing a lot of data, for example, they need to process and save a lot of anti-aliasing.
If my answers are not satisfactory, I have nothing to say. Also, remind others that A card is easy to use and N card is good to play. I tell you responsibly that there is such a saying, but it is nonsense. To put it bluntly, it is used to fool computer city customers. If you believe it, you can check the relevant information. The way I gave you, I judged it best by myself.
Question 4: What is the best sapphire? How to judge? How to identify and choose sapphire
How to identify and choose all kinds of jewelry inlaid with sapphire can be described as brilliant. Wearing it in summer makes people feel cool, and wearing it in winter makes people feel the spring breeze around them. This is the charm of sapphire. When you choose a satisfactory sapphire jewelry, you will feel comfortable and satisfied. So, how to choose sapphire? First of all, it can correctly identify sapphire. The identification of sapphire is the same as that of ruby, which is divided into two steps. The first step is to distinguish sapphire from other sapphires; The second step is to distinguish between natural products and artificial products of sapphire ancient stones. Confused with sapphire are: blue spinel, kyanite, blue tourmaline, blue cone mineral, dong Qingshi, tanzanite and so on. Like ruby, the main difference between sapphire and other blue gems lies in hardness test. Because the Mohs hardness of sapphire is 9, second only to diamond, other possible substitutes and counterfeits are lower than it. For the polished product, the standard hardness of topaz and crystal can be used to determine the hardness, and whether it is sapphire can be roughly judged according to the hardness. In addition, according to other characteristics such as specific gravity and refractive index, substitutes that are easily confused with sapphire can be distinguished. Sapphire has a specific gravity of 3.97-4.08 and a refractive index of 1.766- 1.744. Blue spinel: hardness 8, specific gravity 3.6-3.8, and single refractive index generally 1.72. Blue spinel is gray-blue. No dichroism, unlike sapphire, is a more acceptable method. In addition, the blue spinel under the color filter is reddish; Synthetic spinel is orange tone, while sapphire does not change color. Synthetic spinels sometimes pass off as sapphires, because they contain cobalt and often flash red under strong light. Blue tourmaline: hardness 7, specific gravity 3.05, refractive index 1.62- 1.65, all lower than sapphire. Generally there is no reaction under the color filter. The tourmaline containing chromium presents a bright red appearance under the color filter. The blue of tourmaline is usually dark green and dark green indigo. Experienced people can recognize it at a glance. The refractive index and absorption spectrum are relatively acceptable. Tanzanite: hardness 6.5-7, specific gravity 3.5, refractive index 1.69- 1.70, produced in Tanzania. Zoisite is blue and transparent, and its components are calcium silicate and aluminum silicate. The color is 2% water and 0.02% sodium. It has developed cleavage surface and is not easy to cut and grind. The naked eye can clearly see three colors (dark blue, purple and light green), so tanzanite has obvious color changes from all directions, while sapphire is only dichroic. Dong Qingshi: Hardness 7, specific gravity 2.59, refractive index 1.54- 1.55, dull color, not as bright as sapphire, and strong trichromaticity. One direction is lovely purple and blue, and the other direction is light yellow. Compared with sapphire, it is very different in all aspects. Blue cone ore: hardness 5-5.6, specific gravity 3.67, refractive index 1.78. The refractive index is almost the same as sapphire. But the birefringence of 0.047 is much larger than sapphire. Its dispersion is much larger than sapphire, so its appearance is dazzling. Kyanite: hardness 4-6, specific gravity 3.69, refractive index 1.72. Hardness varies greatly in all directions. The blue crystal column is easy to split, not easy to cut and grind, and even if the cutting and grinding is successful, it is easy to form the appearance of phosphorus. This is easy to distinguish from sapphire. Dong Qingshi, blue cone mine and kyanite are generally treasures that collectors like very much, and they are rarely used as ornaments. After distinguishing sapphire from other sapphires, the second step of identification can be carried out, that is, distinguishing natural sapphires from candidate gems. Whether natural sapphire or artificial sapphire, its mineral composition is corundum, and their physical and chemical properties are very similar. This is to be identified by carefully observing its morphological characteristics and production line. Morphologically, raw natural sapphires often have hexagonal barrels or columns. On the other hand, artifacts look like upside-down or short carrot shapes, without clear edges and corners. In nature, the crystallization and weighing speed of natural sapphire is very slow, resulting in a "hexagonal growth line" parallel to the hexagonal crystal form, also known as the "hexagonal production belt". If there is only a part of this growth line, you can vaguely find parallel straight lines. All sapphires with parallel hexagonal growth lines or growth zones must be natural. Artificial sapphire is produced in a high temperature furnace, and the crystallization time is very short, so there is no time to arrange it regularly along the hexagonal direction. Instead, it is superimposed layer by layer on the surface of arc-shaped (cylindrical) gems, gradually forming a curved "arc growth line". Where is such an arc ... >>
Question 5: How did sapphire come from? The main producing areas of sapphire in the world are Myanmar, Sri Lanka, Thailand, Australia and China. But in terms of gem quality, Myanmar and Sri Lanka have the best quality. The chemical composition of sapphire is alumina (Al2O3), which is blue because it contains trace elements of titanium (Ti4+) or iron (Fe2+). It belongs to the tripartite crystal system. Crystal shape is often cylindrical, short column, plate and so on. The geometric shape is mostly granular or dense block. Transparent to translucent, glass luster. Sapphire can be divided into blue sapphire and brilliant (non-blue) sapphire. Indian cornflower blue is the best color. It is said that sapphire can protect kings and monarchs from harm. It is called the king's stone. Sapphire is designated as the birthstone of September by the international gem community, symbolizing kindness, loyalty and loyalty. Sapphire is one of the five precious and high-grade gems in the world.
Question 6: What do you think of sapphire? There are several ways to identify the quality of sapphire crystal: 1. Irradiate the inside of the crystal with strong light to see if there are bubbles, microcracks and impurities with naked eyes. In the crystal; 2. Irradiate the inside of the crystal with a slightly higher power laser pen in a darkroom to observe whether there are scattered particles and inclusions; 3. Observe the stress of the crystal with a stress meter; 4. Observe the cross scar of the crystal with a polarizer and analyze the lattice distortion.
Sapphire crystal without microcracks, bubbles, scattering, impurities, lattice distortion, small stress and good color has good quality;
Generally, the grades are divided according to the test results of the above four test items.
Question 7: How to choose a sapphire? Sapphire is easy to forge, identify and buy. Sapphire is one of the five precious and high-grade gems in the world, and its hardness is second only to diamonds in nature. Its attractive colors and unique characteristics of natural gemstones have attracted many jewelry lovers. However, in the face of cheap sapphire, consumers need to keep a clear head. First, they should understand whether it is natural or artificial, and don't let fake goods blind their eyes. According to Guangzhou Daily, when people mention sapphire, they usually think it means "blue sapphire". But the word "sapphire" actually includes corundum gems of all colors except red. These non-blue sapphires, such as green, orange, purple, yellow, gray and colorless sapphires, can be collectively called "strange sapphires", "bright sapphires", "colored sapphires" or "magic sapphires". Because the environment of sapphire production involves high temperature, optimizing the color, transparency and inclusion characteristics of sapphire at high temperature is equivalent to imitating the natural environment, which is permanent and irreversible. Therefore, this practice is generally accepted by the jewelry industry. For example, Shandong sapphires and Australian sapphires with too dark or dark blue colors will become lighter after high temperature treatment, Sri Lankan sapphires will turn blue, and light yellow sapphires can also become deeper and warmer yellow sapphires. "Sapphire" is not only blue, but most of the sapphires on the market are treated at high temperature, which is not easy to be detected by manual treatment. Of course, the process and technology of high temperature treatment have always been the secret of the industry, and some recent scientific research and experiments have revealed this process more. However, it is worth noting that high temperature treatment may cause cracks in gems, or make the existing cracks more obvious. Synthetic gemstones are regarded as natural high-grade sapphires in shopping malls. Synthetic gemstones generally include synthetic sapphire, synthetic spinel, synthetic blue tourmaline, synthetic blue zircon and cobalt-containing blue glass. Its characteristics are as follows: synthetic sapphire is homogeneous, clean, with few inclusions, generally with round bubbles, and is isotropic; Synthetic blue spinel: uniform color, slightly gray, octahedral crystal, isotropic body, no dichroism; Synthetic blue tourmaline: green-blue, complex triangular columnar crystal, lower hardness, density and refractive index than sapphire, very obvious dichroism and large birefringence; Synthetic blue zircon: bright color, strong dispersibility and high birefringence; Cobalt-containing blue glass: the color under the color filter is red, the refraction is single refraction, and the refractive index difference is obvious. In addition, there are treacherous acts of passing other low-grade and cheap sapphires off as natural high-grade sapphires, including blue spinel, blue tourmaline, blue zircon, blue cone mineral, kyanite, cordierite and zoisite. Generally speaking, sapphires can be distinguished from these similar minerals by their respective mineral crystal characteristics. The gem-grade blue cone ore is only produced in the United States, but its specific hardness is less than that of sapphire (Mohs hardness 6 ~ 6.5). Moreover, sapphire is easily distinguished from kyanite, cordierite and zoisite due to its high hardness, high density and high refractive index. The main factors to be considered when evaluating and purchasing sapphires include color, weight, transparency and clarity. In order to prevent synthetic products, processed products and imitations, it is necessary to have an appraisal certificate from a qualified institution. Color classification: put sapphire at arm's length and carefully observe whether its color is blue, gold, green, black or other colors, because different colors of sapphire have different prices. You can also observe gems in different environments, such as natural sunlight and artificial light sources, because gems will appear lighter in strong light, but darker in general sunlight. Color uniformity: the color distribution of sapphire is usually uneven, but the high-quality sapphire with appropriate cutting ratio should be evenly distributed on the table or pavilion. Transparency: High-quality sapphire requires high transparency, giving people a bright blue feeling. On the other hand, sapphire with poor permeability cannot give full play to bright light and color effects. Cleanliness: Internal cracks and inclusions will affect the beauty and durability of gemstones. Cutting: The cutting and proportion of gems are very important, which is similar to evaluating the cutting of diamonds. Weight: If you buy a sapphire collection, the heavier the better. But if you make jewelry, you will mainly like it.
Question 8: How to choose sapphire? What we need to pay attention to is that the criteria for choosing sapphires are similar to those for diamond 4C, but the order of importance is different: color (the most important indicator in colored gems), transparency, cut and weight.
Color is the most important reference index for choosing gems, and the value of gems is also highly positively correlated with color saturation.
Sapphire has infiltrated iron and titanium in the mineral crystallization process, so it is blue, which is more in number and larger in particle than ruby. Its color selection requires pure and bright color, and the best products are dark blue and swan blue. Followed by gray blue, green blue, light blue, purple blue and so on.
The interior of natural sapphire is relatively clean, and occasionally flat bands can be seen. When you turn the torus and look at different directions from the waist, you can see different blues and greens. Attention should be paid to the bright and uniform color of artificial sapphire, including blue, light blue and purple blue, with no defects inside.
2. In addition, non-professional customers can also refer to the indicators given in the certificate as a basis for judgment when purchasing sapphires. Common international certificates such as GRS.
Question 9: What about the sapphire motherboard? I think the sapphire motherboard is very good! The function is very good. I just got one. You can look at this first, look at others' and compare them.
I'll give you a website: look at Gong 000 1 first.
Question 10: Is the price of sapphire high? How about jasper? Among sapphires, blue is the best variety of cornflower blue produced in Kashmir, which is rare now. The price of sapphire is closely related to the origin and purity, and the pricing is different. As for the price of jadeite, it has a lot to do with color and transparency. I suggest you go to 18nl, where there is a lot of knowledge about jewelry. You can learn about it.