GLASS DIAMOND
Imitation Diamond Identification And Optimization Of Substandard Goods
With the development of science and technology can be used in place of Diamond More and more imitation, which includes natural and synthetic gemstones colorless gems, diamonds they imitate the effect of excellent, sometimes difficult to distinguish with the naked eye. At present, the optimization of the diamond are mainly two: low-light drilling and Glass Filling. They are mainly for the treatment of diamond clarity.
1. Laser drilling treatment: a laser to burn in diamond in a small body of direct channel package, package body can be laser burned; or after laser drilling a white body with acid bleaching. Treated glass or laser channels available Epoxy resin Sealed to prevent dirt into the channel. It can make dark inclusion shallow, so that the diamond has become well off.
This approach to diamond can be found under the magnifying glass 10 times the orifice and the holes by laser. Where drilling through the crown, when viewed from the pavilion side of the easier to see. After drilling the hole inlay may be covered up. Therefore, identification should be treated as such.
2. Glass filling treatment: the high refractive index glass fracture filling to have a diamond, making it seem the net degree of improvement, thus easier to sell. Its main object is to improve the diamond with open fractures, regardless of the size of the diamond can use the same method for processing. The glass used is similar to the refractive index lead glass diamond. After filling, fractured lower visibility, clarity improved, but it is not durable treatment effect: heat, acid or Ultrasonic wave Cleaning may be damaged. And the filling of the lead glass is sometimes yellow tone, will reduce the diamond’s color grade.
Identification, we can reflect conditions observed in yellow and orange?? Purple or blue?? Green flash effect of the characteristics of interference, and the flat bubble and fractured.
In addition to diamonds imitation diamonds and optimized, there are stone floor together, often by means of such bogus people’s negligence was unscrupulous traders, “succeed.” The current mosaic in three ways:
1. Colorless synthetic sapphire + artificial joint in the strontium titanate. Synthetic sapphire strontium titanate of high hardness and strong color combination of fire, to the effect of imitation diamonds.
2. Diamond + synthetic colorless sapphire or Crystal . It uses a thin diamond crown diamond gloss and high hardness.
3. Small diamond + small diamonds, the synthesis of the two fight a whole.
4. Will be directly mounted to the thin metal on the diamond.
Observation method is not complicated stone mosaic, put together just to find out from the side surface, and find the diamonds, traces of glue on the joints can be sure it is put together stone.
Now have a synthetic diamond, synthetic diamond particles but small, and the cost is too high, yet the market volume, it will not cause confusion in the market.
Optimized diamond to diamond defects removed in order to improve the level of the diamond, but to enter the market, we have identified the appropriate way to handle the diamond has not optimized? Identification and Optimization of imitation diamonds sometimes substandard goods With advanced Apparatus To identify, below are three commonly used are:?
1. Thermal conductivity meter: it is based on the high thermal conductivity of diamond instrument design. Is the use of high thermal conductivity of diamond heat-sensitive components to quickly send out the heat transfer, the instrument lights up quickly, and issued purr. Thermal conductivity meter has a front-end Copper Probe, measurement, open instrument power supply, about 15 seconds after preheat indicator light work, this time, according to room temperature and measured the level of diamond size, according to an outstanding section of the back light device number, (the Japanese heat conductivity meter DIAMONDSELE CT OR) to probe thermal conductivity instrument rose contact with the diamond surface, a rapid increase in light equipment, and issued Chirping diamonds, natural gemstones and synthetic gemstones imitation diamond imitation diamonds (except synthetic Moissanite Sic outside) will not appear purr. It is suitable for rough diamonds, finished, not inlaid diamonds and diamond inlay. Even a small fraction of drilling. Identification is a powerful weapon distinction between imitation diamonds. ?
2. Moissanite (Synthetic silicon carbide Sic) determine the instrument: it is a designed to identify Moissanite (Sic) of the instrument. Diamond and Moissanite is based in the near UV of a different nature. Test Should be used in conjunction with the thermal conductivity meter. Because the thermal conductivity of Moissanite and diamonds similar instrument with a thermal conductivity can distinguish most of the simulation can not distinguish Moissanite diamonds. Therefore, we measured the thermal conductivity may be a gem diamond, there are some doubts may be Moissanite, the only instrument used to test Moissanite OK. ?
Moissanite determine if there is no instrument, there can also be used Moissanite birefringence phenomenon, and in polarized light microscope, light and dark appear to distinguish between changes and Diamonds. ?
3.X Radiography: X-rays can easily penetrate the C atoms, while imitation is absorbed X-ray. According to this theory, we use X-ray method can be distinguished according to Ningken both. A diamond, a gem imitations and tested on the photographic film, the X-ray irradiation, three different X-ray opacity may be recorded; diamond film exposed by X rays, absorption of X imitation Ray can not make film exposure. Developed film, the diamond will not imaging imitation image appeared, this method is suitable for diamond studded group Jewelry .
Appear on the market for fake products and optimize the processor, we already have scientific and accurate method of identification. Unique advantages of natural diamond imitation and optimization is always substandard goods can not match. In the coming days, there will be many “pretenders” to random people eyes and ears, confuse right and wrong. However, the fake is fake after all, they ultimately can not withstand serious examination. As long as we identify and gemology Expert Their tireless efforts, with the constant development of newer, more accurate out of the identification devices, and the careful observation and years of experience, will certainly “fake” detected, but also their true colors, so that they can not market based.
“A diamond is forever, stay forever in a mass” will forever change the mantra!
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GLASS DIAMOND Q & A
What’s The Difference Between Glass And Diamond and Crystal?
I’ve been wondering in a shop just looking at the jewels they have and something caught my attention, it’s the models that’s made out of diamonds/crystals/glasses. So then I’ve been wondering how can I tell if it’s a diamond, crystal or glass?
I need to have the details what a diamond, crystal and glass looks like or what kind of difference they have!
It’s all about bonding!
First, let’s start with defining what is and isn’t a crystal. A crystal is any solid with a regular and repeated “crystal structure”. This means that all the atoms in the material are lined up in a regular and repeated way. Basically a crystal is formed by a unit structure called a “cell” and this cell is repeated over and over. Glass is not a crystal as its atomic structure is disordered (but more on that later).
Crystals are differentiated in two ways: composition and bonding. Graphite and diamond are both the same composition and they are both crystals but because the bonding is different one is used as the “lead” in pencils while the other is very hard (and shinny so it’s good for rings). The bonding in diamond is called sp3 hybridization of carbon. This is a fancy way of describing the state of covalent bonding of carbon. I won’t go into great detail but suffice it to say, because of the stregth and directionality of that bonding, diamond is EXTREMELY hard. Graphite is hexagonally close packed configured carbon, which means its bonded in hexagon sheets with weak bonds connecting the stacked hexagons. These weak bonds between layers allows for it to shear (slide) off easily making it ideal as a writing utensil.
Many different types of crystals exists but I’m guessing you meant ‘what is the material commonly called “crystal”?’ when you asked this question.
This leads us to glass…
I said before that glass is non-crystalline and that’s true, but what you know of as “crystal” (like stemware and expensive knick-knacks) is actually glass, making it one of the most incorrectly named objects of all time!
Glass can be many compositions but it generally starts as sand (SiO2) Soda-ash (Na2O) and Lime (CaO), which is why most commercial glass is called soda-lime-silicates. These compounds are mixed and heated to melting. The trick to making a glass is cooling this melt before the atoms can line up in a crystalline manner. We would say the thermodynamics of cooling must overtake the kenetics of crystallization. Thus, after cooling you have a material with a non-crystalline atomic structure. Basically, it’s as if you froze the disordered liquid structure on place.
As I said, the term “crystal” referes to material that is actually a glass but it has as much as 25% Lead added to increase the refractive index, which makes more light reflect off the glass surface. This makes the glass more shinny, which I guess is appealing to people, though I wonder if it would be as appealing if people knew how much lead was in the glass!
As for telling the difference between them, you could do several things, though unfortunately they tend to be somewhat destructive. Hardness testing measures the strength of the surface bonding, which is different between most materials. Testing the heat capacity difference at phase transitions in a Differential Scanning Calorimeter would also tell the difference. But the best way is to have a trained eye examine the material under a microscope. You will be able to see crystallographic growth directions under a microscope which can tell you about the crystal, and if there aren’t any… it’s a glass.
So as you can se the field of materials science is vast but what differentiates materials usually comes down to the way a material is bonded.
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