How to distinguish the real from the fake? How to distinguish a diamond from a fake

When many friends buy jewelry, they often hear the word "rhinestone", which probably means imitation diamond. In fact, rhinestone is just a general term for imitation diamonds, and rhinestones have many distinctions. So what exactly is the so-called "rhinestone"?

1. Glass: Fake diamonds ground with glass are easy to distinguish because of its low refractive index, and there is no sparkling color light like real diamonds, which can be seen by people with a little experience. And this "rhinestone" is often used in relatively cheap jewelry.

2. Artificial spinel: It lacks the shimmering colored brilliance of diamonds, and when it is immersed in diiodomethane, its outline will be blurred. The contours of a real diamond are clear.

3. Artificial sapphire: colorless and transparent artificial sapphire can also be used as a substitute for diamond after pondering. But it is almost absent in "diiodomethane", while the edges of a real diamond are dark and very clear.

4. Crystal and topaz: The transparent crystals of these two natural minerals are also similar to diamonds after polishing, but they both lack the brilliant fire of diamonds. And they are both "heterogeneous", while diamonds are "homogeneous" and are easier to distinguish with a polarimeter.

5. Zircon: Before the advent of artificial cubic zirconia, zircon was the best substitute for diamonds. Zircon has a strong birefringence, i.e. it has two refractive indices, and there is a large difference between the two refractive indices.

As a result, a very special optical phenomenon has been produced, when the zircon prismatic gemstone is observed with a magnifying glass, it can be seen from the top surface that there are obvious double shadows on the bottom face and the ridge line. Because diamonds are "homogeneous", there is no double shadow.

6. Cubic zirconia (i.e., "Soviet diamond"): This is the most ideal diamond substitute or counterfeit product first introduced by the former Soviet Union, which is a man-made compound and no natural minerals. Since cubic zirconia is very close to natural diamonds in terms of refractive index, dispersion, etc.

However, it has a lower hardness (a specific gravity that is times that of a diamond, and its thermal conductivity is much lower than that of a diamond, so it can still be accurately distinguished from a diamond by instrumentation.

Now everyone finally understands the concept of "rhinestones", in addition to the glass in "rhinestones" is easier to distinguish, other "rhinestones" are generally the most important thing to look at. In natural light, the brilliance of a diamond is always incomparable to that of a "rhinestone" imitation. It is recommended that when you buy in your daily life, you should not buy it if you are really unsure or buy it under the protection of a certificate issued by a professional and authoritative testing agency.

Many very simple and practical methods have been invented and accumulated for identifying the authenticity of diamonds without instruments, distinguishing real diamonds from man-made diamonds, crystals, glass or zircons.

Identifying the authenticity of a diamond by hand is a method often used by those who are more experienced, and gently touching the crystal surface of the diamond with your fingers will give you a sticky feeling, which is unique to real diamonds. Because diamonds have an affinity for oil, and there will be a very small amount of secreted hand oil on the human fingers, this kind of oil and the crystal surface of the stone are in contact, which will produce a sticky feeling due to the affinity of the diamond to the oil. Naturally, those other materials don't have this special feeling.

However, if the appraiser is inexperienced, it is still difficult to distinguish between real and fake diamonds, so use this method with caution. Using a pencil to identify the authenticity of a diamond is a relatively simple method. This was discovered by a Soviet expert in the past, and this simple method was very popular with the average diamond enthusiast, although it was certainly not absolutely reliable to use a pencil alone.

On the crystal surface of the real diamond, the pencil scratches the place where the pencil does not leave a trace, and if it is not a diamond, but glass, crystal and other materials, it will leave traces on the surface.

In general, the accuracy of this method is high when a diamond is identified by pencil marking. However, when identifying, it should be noted that some old diamond jewelry that has been set should not be soaked with water, because if it is jewelry with copper or silver or other materials as a setting, it is easy to oxidize. In addition, the crystal surface of the diamond should also be protected from contact with oil, dust and objects.

Look at the glossiness. There are several types of rhinestones on the market now: Austrian ones.

Czech, this belongs to imports, they have a good gloss and beautiful color. The next is our domestic one, which is much worse in gloss color, you just need to look carefully to distinguish it, and there are glass drills and plastic drills on the market, not to mention.

Summary. The main aspects of distinguishing the authenticity of diamonds are as follows:1

Appearance quality. **The appearance of diamonds***, its surface is smooth, free of impurities, has a regular cut, bright and dazzling, while counterfeit diamonds tend to have an uneven surface, with fine impurities, and are dull. 2.

Polish. **Diamonds are highly polished and can be seen reflecting the inside of the diamond, while counterfeit diamonds will not have too noticeable reflections. 3.

Weight. **Diamonds are heavier, while counterfeit diamonds are lighter. 4.

**。Diamonds are relatively expensive, while counterfeit diamonds are relatively low. 5.

Experimental testing. Through electronic testing instruments, the authenticity of diamonds can be accurately distinguished.

Can you elaborate on that a little bit more?

The main aspects of distinguishing the authenticity of diamonds are as follows:1Appearance quality.

**The appearance of diamonds***, its surface is smooth, free of impurities, has a regular cut, bright and dazzling, while counterfeit diamonds tend to have an uneven surface, with fine impurities, and are dull. 2.Polish.

**Diamonds are highly polished and can be seen reflecting the inside of the diamond, while counterfeit diamonds will not have too noticeable reflections. 3.Weight.

**Diamonds are heavier, while counterfeit diamonds are lighter. 4.**。

Diamonds are relatively expensive, while counterfeit diamonds are relatively low. 5.Experimental testing.

Through electronic testing instruments, the authenticity of diamonds can be accurately distinguished.

Summary. 1.Magnifying glass observation:

There are tiny bumps on the surface of the diamond, called "cut lines", which are only found in real diamonds, not in fake diamonds; 2.Polishing observation: the surface of real diamonds has polishing, while the surface of fake diamonds does not; 3.

Spark observation: The sparks reflected by the light in real diamonds are seven colors, while fake diamonds have only one color; 4.Weight Observation:

Real diamonds are heavier than fake diamonds because real diamonds are denser than fake diamonds; 5.Colorimetric observation: Real diamonds are more transparent than fake diamonds, and fake diamonds are duller than real diamonds.

1.Magnifying glass observation: there are tiny concave and convex on the surface of the diamond, which is called Bishen "cut lines", which are only found in real diamonds, not in fake diamonds; 2.

Polishing observation: the surface of real diamonds has polishing, while the surface of fake diamonds does not; 3.Spark Watch:

The sparks reflected by the light of real diamonds are seven colors, while fake diamonds only have one color; 4.Weight observation: Real diamonds are heavier than fake diamonds, because the density of real diamonds is greater than that of fake diamonds; 5.

Colorimetric observation: Real diamonds are more transparent than fake diamonds, and fake diamonds are duller than real diamonds.

Can you elaborate on that a little bit more?

1. Observe the appearance: there are fine concave and convex lines on the surface of the diamond, which is called "Hokage", the "Hokage" of real diamonds is clear, and the "Hokage" of fake diamonds is blurred; 2. Observe the weight: the weight of a diamond is heavier than that of other gemstones, and the weight of a real diamond is heavier than that of a fake diamond; 3. Observe the luminescence:

The brilliance of diamonds is special, the brilliance of real diamonds is more dazzling, and the brilliance of fake diamonds is dull; 4. Lu Weina's polishing degree is corrected: the polishing degree of diamonds is very high, the polishing degree of real diamonds is higher, and the polishing degree of fake diamonds is lower; 5. Observe the color: the color of the diamond is generally transparent, the color of the real diamond is clearer, and the color of the fake diamond is more blurred; 6. Abrasion resistance:

Diamonds have very strong wear resistance, real diamonds have stronger wear resistance, and fake diamonds have weaker wear resistance; 7. Polishing line: The polishing line of diamonds has a special shape, the polishing line of real diamonds is clearer, and the polishing line of fake diamonds is more blurred.

Summary. Kiss, the following methods can distinguish the authenticity of diamonds. Naked eye observation method:

Real diamonds generally only glow blue and orange, while imitations tend to glow with colorful light; The corners of real diamonds are sharp and sharp, while the corners of imitation diamonds are easy to wear and tear and are relatively round and blunt. Ha gas test method: real diamonds have good heat transfer ability, and the hot gas dissipates quickly.

You can take a breath on the diamond, and if the moisture disappears immediately, it is usually true, while the moisture on the imitation usually stays for a few seconds before disappearing. Wipe test: Real diamonds are very hard.

If you rub the paper on the surface of the diamond, the real diamond will not have scratches, while the imitation will generally have obvious scratches. Water Drop Test: Drop a drop of water on a diamond, if the water droplet can maintain its spherical shape for a long time, it is generally a real diamond, while the water droplet on the imitation will generally disperse quickly.

Scribing test: Diamonds have a high refractive index. Draw a line on the paper and place the diamond face down on the straight line.

Generally, real diamonds cannot see the straight lines pressed underneath, and if they can be seen, they are usually imitations.

Kiss, the following methods can distinguish the authenticity of diamonds. Naked eye observation method: real diamonds generally only glow blue and orange light, and imitation products are easy to glow with colorful light; The corners of real diamonds are sharp and sharp, while the corners of imitation diamonds are easy to wear and tear and are relatively round and blunt.

Ha gas test method: real diamonds have good heat transfer ability, and the hot gas dissipates quickly. You can take a breath on the diamond, and if the moisture disappears immediately, it is usually true, while the moisture on the imitation usually stays for a few seconds before disappearing.

Wipe test: Real diamonds are very hard. If you rub the paper on the surface of the diamond, the real diamond will not have scratches, while the imitation will generally have obvious scratches.

Water Drop Test: If a drop of water is placed on a diamond, if the water droplet can maintain its spherical shape for a long time, it will be a real diamond, while the water droplet on the imitation will generally disperse quickly. Scribing test method:

Diamonds have a high refractive index. Draw a line on the paper and place the diamond face down on the straight line. Generally, real diamonds cannot be seen in the direct transportation search line pressed underneath, and if they can be seen, they are generally imitations.

Refers to the polished diamond, which is a mineral that is the rough of diamonds. To put it simply, diamond is a crystal composed of the element carbon in Keizao, which can be formed from high pressure and high temperature conditions in the deep part of the earth, and can also be synthesized. Beautiful, rare, and a symbol of love and fidelity, diamonds represent eternal love.

The methods of distinguishing the real from the fake of diamonds include looking at the lines, the fire, and the hardness.

1. Look at the lines.

Place the flat side of the diamond face down on a piece of paper with a lot of text, ensure that there is enough light around it, and no human body or object casts shadows on the diamond, if you can see the words on the paper through the diamond, even if it is very blurry, then the diamond is fake, and the real diamond is not clear.

2. Look at the fire.

You can look at the fire to distinguish the diamond, under the illumination of the light, the fire of the real diamond is shiny and dazzling, which can show a variety of colors of rotten fire, while the fire of the fake diamond is more dull, and the fire looks stiff and unnatural.

3. Look at the hardness.

Real diamonds are the hardest naturally occurring gemstones, and the surface is scratched back and forth with a sharp object without leaving any marks, while the surface of a fake diamond leaves visible marks after being scratched back and forth.

How to care for your diamond

1. Clean regularly.

During the wearing of the diamond, some dirt will accumulate on its surface, and over time, the dirt on the surface of the diamond will accumulate more and more, which will affect the luster of the surface of the diamond. Therefore, regular cleaning of the diamond can maintain the luster of the diamond's surface.

2. Avoid collisions.

When wearing a diamond, avoid bumps. Because diamonds are the hardest gemstones in the world, they are fragile and can break when they are violently impacted from the outside, affecting their original value.

3. Avoid chemicals.

When bathing or swimming, it is advisable to remove the diamond and store it properly. Because bath and swimming water contains a lot of dirt and chemicals, it can cause corrosion on the surface of the diamond, which can cause the surface of the diamond to lose its luster.