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Today, diamond consumption is becoming more and more civilian. With the advent of synthetic diamonds and diamond replicas, it is natural that people are beginning to question whether diamonds are true or not.
Synthetic diamond is also a diamond
Synthetic diamonds are synthetic diamonds that have the same characteristics as natural diamonds. Therefore, synthetic diamonds are also diamonds.
However, the price of diamonds and natural diamonds cultivated in the laboratory is quite different. According to statistics, synthetic diamond production accounts for about 1% of global diamonds. In terms of output value, the annual sales of synthetic diamonds worldwide is about 1 billion. US dollars, and the annual wholesale sales of natural diamonds worldwide can reach 22 billion US dollars.
Therefore, you need to be wary of synthetic diamonds posing as natural diamonds.
This is a HPHT synthetic diamond weighing 10.02 carats and sanded from a 32.26 carat synthetic rough .
The world's largest synthetic diamond
The technique of synthesizing diamonds began in 1800, and it was not until 1954 that GE first produced the first synthetic small diamonds by high temperature and high pressure (HTHP). Recently, synthetic diamond technology has made new breakthroughs!
Researchers at the University of Augsburg, Germany, have discovered a method for the specialized manufacture of synthetic diamonds by chemical vapor deposition at about one-tenth of atmospheric pressure. The diamond synthesized by this method activates the carbon-containing gas in a certain way under low pressure conditions, so that the carbon atoms are supersaturated on the substrate and grow into diamonds.
Based on this, a 155-carat disc-shaped single crystal diamond was born with a diameter larger than the diameter of the giant diamond “Cullinan No. 1†set on the Queen's Scepter.
Although the potential for the use of disc-shaped synthetic diamonds in jewelry is very limited, this technology may be widely used in industry.
Moissanite, natural diamonds and cubic zirconia
Identifying the naturalness of diamonds, these "rumors" don't believe, do you know this?
Rumors: Diamond imitations have no inclusions!
Diamonds are a product of nature. Therefore, most diamonds have inclusions, and it is a rumor that neither natural nor synthetic diamond replicas have inclusions.
The inclusions are formed during the growth of the gemstone crystals. In fact, the inclusions help gemologists to identify whether a gemstone is a natural gem or a synthetic gem. Of course, some diamonds are flawless, so you can't see the inclusions. In addition, the glass replica contains bubbles, which are considered to be natural inclusions when not observed by trained personnel.
If you are a non-professional and have no experience in observing diamonds, it may be difficult to see the contents of the diamond due to reflections and facets, so it is not as easy to see the contents with a magnifying glass.
Diamond inclusions
Rumors: If it flashes, it must be a real diamond!
For laymen, almost all faceted gemstones, such as synthetic carbon silica, colorless natural zircon, will flicker. Therefore, using flashing to judge whether the real drill is not absolutely reliable!
The gleaming diamonds that gemologists say are some very special features: flash.
In addition to scintillation, flash also refers to the form of light and dark areas formed by reflections inside the diamond. Flash is just one aspect of the appearance of a diamond. Other aspects include brightness (internal and external white light reflected from the diamond when looking at the diamond) and fire (white light is scattered into all colors of the iridescent color). All of these elements combine to form the unique visual appearance of the diamond.
Blinking (flash) depends on the following factors:
Cut
Bright cut diamonds usually look brighter than stepped cut diamonds, even if they have the same number of facets and the same shape. The difference in appearance depends on the arrangement of the facets.
Number of facets
The more diamond facets, the more reflective and astigmatic reflective surfaces. Round brilliant cut diamonds with 57 or 58 facets are more flickering than 17 or 18 faceted single-turn diamonds.
Cut quality
Cut diamonds are still diamonds, but they don't produce the visual effect you want.
Two round brilliant cut diamonds, the cut diamonds (left) are brighter than the cut diamonds (right).
illumination
Diffuse lighting and spotlight lighting show different appearances.
Cleanliness
Dust-laden diamonds do not flicker. Diamonds are easy to absorb grease, so regular cleaning is important!
Rumors: Real diamonds have sharp edges, and "imitation" diamonds are not!
This is true only for replicas made in the mold, such as plastic and some glass. Natural diamonds have sharp edges, but all gem materials used in synthetic and imitation diamonds are also available.
In addition, all natural or synthetic gemstones are subject to wear and tear on the facet line (the line at the intersection of the two facets) due to damage and wear.
Rumors: To the natural diamonds, will not get fog?
The results of such fog tests are affected by the environment and humidity. In fact, the reaction between synthetic diamonds and natural diamonds is exactly the same.
Handling natural diamonds
Some diamond dealers make diamonds more attractive by changing the color or clarity of the diamonds to increase their value.
The method of changing the color, such as covering the diamond facet with an optical film, irradiating the diamond, or subjecting the diamond to high temperature and high pressure hot forging.
The diamond on the left is light brown-pink. This color comes from the coating. After the coating is removed, its original color is the image on the right.
Ways to improve clarity, such as crack filling.
The left side is filled with diamond cracks, and the right side is filled with diamond cracks. The difference is really big!
In fact, it is not simple and reliable, and you can determine whether it is a natural diamond or other materials by yourself. The most reliable is the conclusion after testing by professional instruments. Therefore, when purchasing diamonds, ask for The identification certificate of an international or domestic authoritative appraisal agency is very necessary.
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