Returning to the cabin, Chen Wenzhe directly picked out a large blue gem and looked at it without any politeness.
After just a quick look, he discovered that the crystals inside were arranged very regularly, and this was definitely not sapphire.
Because the crystals inside the sapphire will not be so regular when photographed, and may even be a bit messy.
"Spinel?" Chen Wenzhe soon thought of what it was. After all, there are only so many kinds of gems in the world, so it was not difficult to guess.
There are two blue varieties of blue spinel, namely ferromagnetic spinel and zinc spinel, with colors ranging from light blue to dark blue.
As a gem variety, they are collectively called blue spinel.
In comparison, blue spinel is far less famous and valued than red spinel.
In appearance, the best-quality blue spinel is similar to some sapphires, showing bright blue or light purple-blue, and its luster and transparency are also very attractive, but it is extremely rare.
Most blue spinel is a deep, dark blue that tends to smoky gray, even with a purple tint.
Its luster and transparency also always have a dull and vague feeling.
To properly lighten the color, blue spinel is often processed quite thinly.
Like sapphire, its cut shape is generally oval with mixed facets.
Of course, this does not mean that all blue spinels are no good, all are not good, and all have little value.
On the contrary, there are really some treasures among blue spinels.
For example, a few blue spinels have cat-eye effect and starlight effect (radiating starlight).
Good quality blue spinel is difficult to distinguish from sapphires of the same color at first glance.
However, blue spinel is single-refractive and has no pleochroism, while sapphire may have obvious pleochroism.
However, light blue sapphire cannot be distinguished from blue spinel due to its lack of pleochroism.
However, there is a clear difference in the relative density of the two, and the refractive index is also different, so it is easy to distinguish them.
As for the deep and dark blue spinel, it always gives people a dull and unclear feeling, so the price is not high.
Also, this feeling is quite special, and experienced people can identify it based on this feeling.
Obviously, the blue spinels in front of Chen Wenzhe are not good things because the color is not good.
At this time, Chen Wenzhe was already very disappointed. What he wanted was good things, collectible treasures, not these rags.
Chen Wenzhe knew that maybe he was too greedy, because blue spinel is mainly produced in the gemstone gravel layer of Sri Lanka, and a small amount is also produced in Myanmar.
South Vietnam? Chen Wenzhe’s mind is a little different!
Don't tell me, Chen Wenzhe suddenly remembered that South Vietnam really produces a top-quality blue spinel.
With the idea in mind, Chen Wenzhe pondered and once again identified the gems on the table.
He had just noticed that the quality of these gems varied, and some of the beautiful ones were even synthetic gems.
Of course, there are some gems here that are indeed of some value, which require his careful identification.
Some of the bad colors were picked out.
Rare, well-colored blue spinel is worth as much as red spinel.
The common, dull-colored blue spinel has a very low value.
Whether it is natural or synthetic, it has little value.
Look at those beautiful colors, but after lighting, they have red fluorescence. This is synthetic.
Like synthetic ruby, dark blue synthetic spinel was one of the first synthetic gemstones created in the early 20th century.
Before the success of synthetic sapphire, blue synthetic spinel was colored by adding cobalt.
The color-causing elements of natural sapphire are titanium and iron, which are completely different from this.
Therefore, when illuminated by strong tungsten light, this synthetic spinel will emit a unique and weak red fluorescence that cannot be seen in any other gemstone. This is a valuable identification mark.
Of course, blue synthetic spinel is not used to imitate natural spinel, but to imitate sapphire that is much more valuable.
For example, the light blue and light blue-green synthetic spinels in Chen Wenzhe's hands are often used to imitate aquamarine, which is also sapphire.
But the colors of both are different from the soft light blue of aquamarine.
The light blue synthetic spinel will show a gray-purple hue against the white background.
The light blue-green synthetic spinel has a cooler tone and will appear greener in strong light.
This batch of gems is not good, Chen Wenzhe is very sure of this.
However, the natural spinels inside still aroused his interest.
However, the value of these natural spinels is very low.
But those beautiful spinels are synthetic and worthless.
Needless to say, the pretty boy sitting not far away had no good intentions at all.
He was probably thinking of using this batch of things to deceive him from the very beginning.
It's just that this guy doesn't know that there are still some natural spinels in it, which are of some value.
The most important thing is that the color should be cobalt ore, not iron, zinc, titanium and other elements.
If the color is cobalt, that is to say, the spinel turns blue because it contains cobalt ore. Such spinel is called cobalt spinel.
As Chen Wenzhe knows, one of the top blue spinels in South Vietnam is cobalt spinel!
Cobalt spinel is a blue spinel colored by cobalt.
However, not all blue spinels are cobalt spinels.
Some iron-zinc-colored spinels range in color from gray-blue to black-blue.
Cobalt spinel is a rare and valuable variety among spinels.
In recent years, cobalt spinel has attracted more attention in the gem market, and the price of blue spinel at auctions has also increased.
Myanmar, Sri Lanka, Tanzania, South Vietnam and other countries all produce cobalt spinel.
However, many of the cobalt spinels on the market come from Sri Lanka, and not many people know that South Vietnam also produces this kind of gemstone.
Just because not many people know it doesn't mean that everyone doesn't know it.
You should know that the color of South Vietnam's cobalt spinels is gorgeous. Although most of the cobalt spinels produced are small and rare, the ones with high quality are also the most expensive.
From the large pile of blue spinel in front of him, Chen Wenzhe saw the characteristics of the cobalt spinel native to South Vietnam.
It’s just that these are all ordinary colors, and the main color-causing element of this ordinary blue spinel is iron. The blue spinel colored by the iron element has a gray tone.
The difference is cobalt spinel. This gemstone is composed of a small amount of iron elements and cobalt elements that interact within a certain proportion, thus presenting a bright cobalt blue color.
The content of cobalt determines the blue concentration in spinel.
The concentration of blue ultimately determines the beauty and value of spinel's appearance.