Natural pink diamonds are very rare. As a result, several treatments are developed to introduce CVD pink diamonds into both natural and HPHT synthetic diamonds. One technique that’s widely used to produce CVD pink diamond involves the conversion of trace amounts of isolated nitrogen into N-V centers (nitrogen-vacancy pairs) through a combination of irradiation and annealing processes.
NV centers completely absorb yellow and orange light, thus creating a pink to red color. The trace amounts of isolated nitrogen needed for the treatment to work properly can occur naturally within the starting materials. Be incorporated during synthetic growth or be generated by disaggregation of other nitrogen-bearing defects in natural diamonds during high-pressure and high-temperature (HPHT) treatment.
What is CVD Pink Diamond
One technique that’s widely used to produce CVD pink diamond involves the conversion of trace amounts of isolated nitrogen into N-V centers (nitrogen-vacancy pairs) through a mixture of irradiation and annealing processes.
Why is CVD Pink Diamond Testing Machines a Priority?
With the growing demand for CVD pink diamond, it’s more necessary now than before to develop technology that will effectively separate natural diamonds from their synthetic counterparts.
The various CVD pink diamonds testing machines available within the market and the way they’re helping in bringing about more transparency.
Technology has permeated through every aspect of the jewelry business, so it’s no surprise then that the diamond industry has become rather contingent on this technology. With the increase within the volumes of CVD pink diamond, specialized machines that will accurately identify a natural diamond is the need of the hour.
Not only does it provides a stamp of authenticity, but it also increases the confidence of the buyer towards brands selling diamonds or jewelry. Various diamond grading labs and testing companies have introduced a variety of CVD pink diamond testing machines that have interesting features and are available for purchase by diamond graders.
Materials and Methods of CVD Pink Diamond
They classified from 0.27 to 0.72 ct and showed remarkably saturated CVD pink diamond coloration. These CVD lab-grown diamonds are representative of the present pink-colored production process used.
Experienced diamond grading staff determined color and clarity grades using GIA’s grading systems (see, e.g., King et al., 1994). Internal features were examined with both a typical gemological binocular microscope and a research-grade microscope, using a kind of lighting techniques.
Reactions to ultraviolet (UV) radiation were checked during a darkened room with a conventional four-watt combination long-wave (365 nm) and short-wave (254 nm) UV lamp. We also tested samples for fluorescence, phosphorescence, and growth characteristics using the Diamond Trading Company (DTC) DiamondView instrument. Phosphorescence images were collected with a 0.1-second delay and 5 seconds of exposure duration.
Results of CVD Pink Diamond
CVD Pink Diamond Color
All the samples had a strongly saturated pink hue, with color grades starting from Fancy Intense to Fancy Deep.
Seven samples were pure pink; the waiting 12 also had a purple segment. Generally, all the CVD pink diamonds showed even color distribution with no visible color concentrations.
CVD Pink Diamond Clarity
The samples had relatively high clarity. Were given VS clarity grades, one was VVS, and only two received grades. Clarity grades were usually impacted by pinpoints and little black compositions with irregular shapes.
Small radial fractures were recognized surrounding some of the relatively large inclusions. Typically, the small inclusions and pinpoints were randomly distributed. In two samples, they occurred together in cloud-like groups.
Reaction to UV Radiation.
All the samples consistently pointed moderate-to-strong orange fluorescence to both long- and short-wave UV radiation. Obvious turbidity was also observed.
No phosphorescence to conventional long- or short-wave UV radiation was observed. When disclosed to the high-intensity ultra-short UV wavelength of the DTC DiamondView (~225nm), all samples showed strong orange or orangy-red fluorescence.
The fluorescence was evenly distributed in just three of the samples; all other shad bands of weaker orange color. Generally, the fluorescence bands were uniform in thickness—though thickness varied in parts of some samples—with sharp, well-defined boundaries that were oriented nearly parallel to the table facet.
Narrow growth striations, a common characteristic in CVD pink diamond, were only observed surrounding small black inclusions—a good indication of high localized internal pressure.
The grooves remained on the girdles after the samples were faceted. In this study, the same laser grooves were seen on two of the samples that had unpolished girdles.
In both samples, however, they were far less apparent than on the faceted samples tested for the earlier report, with the edges being more rounded.
Infrared Absorption Spectroscopy.
Defect-related absorption was observed in three IR regions(1500–1100, 3300–2700, and 7000–5800 cm−1). The main features within the 1500–1100 cm−1region (figure7) included a sharp peak at 1344 cm−1and broadband at ~1130 cm−1attributed to isolated nitrogen.
Important Factors to Consider Before Purchase CVD Pink Diamond
Some of the important aspects to think about before purchasing a verification instrument is kinds of CVD pink diamond used, i.e., size, color, shape, and loose/ mounted as those influence the choice of instrument.
Large volumes of melee would require different levels of automation than a small number of larger stones. Therefore the volume of goods plays a key role.
Some instruments require no experience in the least, whereas other devices require trained operators, so if you’re considering purchasing a complicated instrument.
You would like to create sure that you simply have a talented operator who can use it. Counting on your requirements, you want to decide if you need a transportable instrument.
If you use it in various locations or test stones outside your own premises. Like any purchase, the budget plays a key role within the final judgment. Lab-grown diamond Verification Instruments vary greatly in cost. Due to several factors, then it’s important to stay cost in mind.
A highly saturated natural CVD pink diamond is rare. Consequently, several techniques are developed to introduce pink color into natural and HPHT-grown synthetic diamonds.
The CVD pink diamond examined during this study has pink hues that are like those of their natural counterparts and offer a potential new source of attractive gems within the marketplace.
Proper identification of this gem material can be achieved through a combination of standard gemological properties (e.g., unusual internal graining, high strain, and distinctive zoned orange fluorescence) and a number of other characteristic spectroscopic features.
There’s no doubt that the growth technique will still improve, and CVD pink diamonds of higher and better quality are going to be produced.
Why New Grown Diamond is the best place to buy CVD Diamonds
The reason you want to buy CVD Diamonds from us is quality, but that’s not your sole reason to pick us. Buyers have many other concerns about diamonds, and we try to do our best to meet them through our products.
We are the Finest Lab Grown CVD Diamond Manufacturer & Wholesaler in Surat.
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