A professional will help you evaluate the Diamond Fire H A

This one is still good. The cost performance is also high, because the cut is 3ex, so the fire is the same.

3vg and above are all with eight hearts and eight arrows.

Hehe, you can ask me if you have any questions.

First of all, we have to use the software of Didi Chuxing on our mobile phones, this app used to be called Didi Taxi, but recently it has been changed to Didi Chuxing due to factors such as enterprise integration. When you're done, the icon looks like this. After opening the software, the system will prompt us to turn on GPS and WiFi, WiFi can not be turned on, but we must turn on GPS, which plays a role in positioning, so that the driver knows where we are, and should pick us up from **.

In order to verify and ensure the quality of service, we usually have to log in to Didi before calling a car, click on the avatar in the upper left corner, no need to register, as long as we pass the mobile phone verification. After turning on GPS, you will go to the Didi taxi page, as shown in the picture is our current location, now there are many kinds of Didi taxi services, such as hitchhiking, express cars, taxis, etc., we can choose the car we want above. Although there are many models for everyone to choose from, it is still recommended to choose a car rental car, after all, the service is relatively ***.

Once selected, we click on "Where am I going" below. After clicking on where I am going, we will see the page as shown in the image below, we enter the address we want to reach in the input box, then there will be an address prompt below, we click on the address option that we confirmed. At this point, the page will return to the page shown on the map, and once we have decided on the destination, click on "Call a Taxi" below.

After clicking on the car to rent a car, Didi Chuxing will issue a taxi command, which will be issued on the software of the Didi Chuxing Driver Edition of the nearby driver, and if the driver receives it, we can successfully call the car.

Diamond fire is also known as the "scintillation" of the diamond, which is whether the diamond is enough to sparkle. A diamond's fire is affected by three main factors – cut, fluorescence, and the diamond's brilliance. Cut is the most important factor, so what is an HCA fire test diamond?

HCA Fire Test Diamonds

Diamond fire is also known as the "scintillation" of the diamond, which is whether the diamond is enough to sparkle. The fire of a diamond is mainly affected by three factors - cut, fluorescence and the luster of the diamond, among them, the cut is the most important factor, and 3ex is the best cut of the diamond, but some people who have bought 3ex diamonds often feel that their diamonds are not shiny enough, so they will test them some.

The diamond fire test network that everyone says refers to the HCA fire evaluation**,**because it is a foreign one**. It is said that the HCA fire evaluation** can measure the HCA fire of a diamond, which is based on the diamond cut data to calculate the reflection and refractive degree. Go to the HCA fire evaluation**, enter the GIA diamond data into it, and you can see the results as shown in the figure:

The first light return: As the name suggests, it is reflective, the more reflective the diamond, the brighter it will naturally appear.

The second fire is fire, which is the rainbow of scattered light from the diamond, which can emit fire even when the light is low. Demolition of land.

The third scintillation: the sparkle of the diamond, which is the sparkle of sparkle that is emitted by the cut diamond on average across facets under the movement of the appropriate light source.

The fourth spread: the malleability of the diamond, that is, the diameter of the diamond is the same carat, which is not large.

Therefore, the lower the cut number in the HCA test, the better, especially the fire, which is an important parameter related to the fire of a diamond.

Is the HCA cut test authoritative?

As soon as this ** spread, it was questioned by everyone, is the value of the fire test** test true? Is there any basis for the fire test? In addition, if the diamond's weight, color, purity, cut, etc. are the same, do the so-called pavilion depth, waist circumference and other numbers also affect the diamond in the fire test**?

In fact, the HCA cut test is not a test of a jewelry organization, its** is also unknown, and the world's major well-known jewelry appraisal institutions have not given it the right one, so it does not have any scientific authority. When you buy a diamond, if you want to ensure that the diamond has a good fire, as long as you ensure the diamond cut 3ex, choose a good diamond fluorescence, and buy a diamond that is not milk, coffee or green, as long as these conditions are met, the diamond will definitely have a good fire.

Diamond Fire Grade Test**.

The HCA Fire Review**, or HollowayCut Adviser, is a measurement system on PriceScope** that is said to be used to assess a diamond's fire level and give a score accordingly. According to the analysis, HCAHCA calculates the refraction and reflection of light inside the diamond based on the diamond's various cutting proportions (such as full-depth ratio, table width ratio, crown angle, pavilion angle, culet), and finally calculates the diamond's fire grade.

Is the diamond fire grade test reliable?

Many consumers are entangled in the diamond fire score given by this **, and some EX grade diamonds identified by the GIA report are directly given a VG rating on this **, which makes many people very depressed. But in fact, the level of this ** score cannot be completely used as a reference basis.

The HCA score is mainly calculated based on data such as crown angle and pavilion angle. However, a diamond's sparkle is also affected by polish, clarity, fluorescence, and many other factors, which are not taken into account in the HCA score. And if it is a milk coffee diamond with reasonable proportions, it will also have a good fire score in this system, but in reality we all know that this is impossible, after all, milk coffee diamonds are one of the factors that most cover up the fire.

Garry Holloway, who designed the scoring system, said: "The system is constantly being tweaked and improved, and the results are for reference only, and it takes a professional evaluation to buy a sparkling diamond."

Therefore, the fire score test results of HCA are for reference only, and there is no strong authority, if ordinary consumers want to ensure that the diamond can produce a good fire, then choose an EX grade diamond, with hail and the corresponding diamond fluorescence grade, and exclude the milk coffee option.

Diamond jewelry.

Diamond fire is the light reflected by the diamond, which is dominated by a soft and cool blue light, and orange can also be observed when the diamond is turned. But when we look at the fire of different diamonds, we can find that some diamonds have strong fire and some are weak, so what is the best standard for diamond fire? Let's take a look.

Diamond fire generation conditions.

1. Dispersion value.

Dispersion is an important factor in the formation of a diamond's fire, and in order to make a diamond release a perfect fire, the gem material must first have a high enough dispersion value, such as a diamond.

2. Specific processing angles and proportions.

Diamonds need to follow certain rules during the cutting process to produce stunning fire.

Diamond fire is the best standard.

1. The diamond cut should be good.

Diamond cut is an important factor for the diamond to release brilliant fire, which directly affects the angle and proportion of the diamond cutting, there are three aspects of cut, cutting ratio, polish, symmetry, all to achieve EX that is, 3EX cut, then the diamond cut is the best, but also can reflect the best fire.

2. Strong diamond fluorescence.

There are also two main colors of diamond fluorescence, blue fluorescence and yellow fluorescence, if it is blue fluorescence, it will increase the fire of the diamond. However, the stronger the fluorescence, the greater the impact on the diamond's fire. And diamonds that fluoresce are cheaper than diamonds that don't fluoresce in the same grade.

3. The clarity of the diamond should be high.

Clarity is also what affects a diamond's fire, and a poor clarity can affect the dispersion of the diamond, making the diamond's fire look less brilliant.

Through the above analysis, you can find that the best criteria for diamond fire can be said from three aspects: cut, fluorescence, and clarity, and each aspect can present a better fire effect if it reaches a certain standard. Consumers can also choose according to these principles when buying diamonds.

Diamond jewelry.

The brilliance of the diamond copy is also called "fire", and it can be reversed.

Bai emits a colorful and bizarre DU colored light, especially the soft and cool blue light DAO, which is the result of diamond dispersion. Dispersion is the magnitude of the refractive index that changes with the color of light. Of all natural gemstones, diamonds have the strongest dispersion.

As a result, the diamond will have a beautiful brilliance as cold and dazzling as a flame. If you turn the diamond, you will find that the strange brilliance on the diamond can change rapidly, sparkle erratically, and be unusually charming, this phenomenon is also called the "scintillation" of the diamond.

1. Cut. Cut is the human factor that affects the fire of a diamond, cut includes the diamond's cut proportions, symmetry and diamond polishing, the best diamond cut in the world is 3EX, commonly known as the ideal cut.

2. Fluorescence. Of course, fluorescence is divided into blue fluorescence and yellow fluorescence, if it is blue fluorescence, it will increase the fire of the diamond.

3. Diamond luster. Diamonds with poor luster may have a creamy color, which can be a good cut. However, the outer layer of cream-like Dongdong will block the fire of the diamond, and the luster is rarely identified in China, and it is rarely indicated on the certificate.

Diamond fire comes in.

Four kinds: source external fire, internal fire, dispersion fire, flash fire. In addition to the transparency of the diamond itself, it mainly depends on the diamond cutting technology, a craftsman with exquisite technology, through cutting, polishing and polishing, so that the surface of the diamond is more flat and has a high reflectivity.

Diamond fire is directly affected by the diamond's **, if a diamond has been polished by senior craftsmen, so that the diamond has the most suitable number of facets, size and high-quality polish, can make the diamond shine and reflect the most brilliant fire.

The concept of fire. The so-called fire refers to the colorful light refracted from the inside of the diamond seen from the diamond table under the illumination of sufficient light of the diamond, among which the blue light is the majority, because the more intense the blue light, the whiter the color of the diamond, the less impurities.

The fire of a diamond is also known as the dispersion of a gemstone. What is the dispersion of a diamond's fire? The so-called dispersion refers to the phenomenon of the decomposition of polychromatic light into monochromatic light, commonly known as "fire", "fire head" or "fire".

The dispersion of a diamond's fire is also known as the dispersion ability, and the difference between the refractive index of the gemstone under red and violet light is the dispersion of the gemstone. The dispersion of the diamond's fire represents the strength of the dispersion of the gemstone, the higher the dispersion, the more obvious the dispersion.

Dispersion of common gemstones.

Diamonds: Red, Sapphire:

Cubic zirconia:

Spinel: Topaz: Crystal:

Glass: The fire of the diamond is from the upper surface of the diamond (ring) (countertop) to the bottom, when looking with a light or sunlight, follow the direction of the light, and at the same time slowly turn the ring with your hand, not flipping, but always put the table up to the light source, if it is a good cut, you can see the beautiful fire, it is best to look with the help of a magnifying glass. A diamond cut standard should exhibit a distinct "fire", so named for its brilliance flowing through the diamond like a flame.

From the naked eye, the diamond has a particularly strong luster, and the blue and orange colors can be seen when the diamond is turned, which we call fire; Imitation diamonds, on the other hand, generally look pale, have no fire, or have a particularly strong fire, with a red color.

That's probably how it looks!

The biggest difference is the facet and angle of the diamond, the diamond has good fire because it is a transparent gemstone, which can show the dispersion well.

In contrast, colored gemstones produce a little less fire due to their natural color and transparency. The shape, shape and cut ratio of a gemstone, and the quality of the polish all have an impact on the quality of the fire. Each gemstone has a different dispersion value, so the resulting color light is different in clarity and fire.

Moissanite. Left) with diamond fire.

Comparison Generally speaking, a gemstone with a dispersion value higher than it is considered a high dispersion gemstone, and these gemstones are carefully cut to see the fire. For example, diamonds have a dispersion rate and are highly dispersive gemstones, so they will shine brightly when exposed to light.

Diamond fire, that is, the brilliance of diamonds, it can reflect colorful and bizarre colored light, especially soft and cold blue light, this phenomenon is the result of diamond dispersion.