People's praise for candlelight has a long history.
But you know what?
This small flame is actually made up of millions of shiny and burning nano-diamond particles?
This little flame is actually made up of millions of shiny and burning nano-diamond particles?
N 1
The secret of candlelight
The secret of candlelight
Recently, scientists found that candlelight burning once per second can produce 6.5438+0.5 million miniature diamonds.
Professor Zhou and his students jointly created a sampling technology to obtain the central particles of candle flame, and obtained and displayed the images of soot particles in the central flame under transmission electron microscope and high-power transmission electron microscope.
Blocks c and d show an amazing number of nano-diamond particles. Previous studies have shown that hydrocarbon molecules at the bottom of the flame will be converted into carbon dioxide gas at the top of the flame. But before this research, the transformation process was always a mystery, and Professor Zhou finally found diamond nanoparticles in the transformation process.
N2
The fleeting splendor
A brief glory
Unfortunately, these diamonds can't be extracted and used, because they are all consumed in the process of burning. But we can catch a glimpse of the charming and romantic candlelight and such a wonderful chemical reaction.
Just as all the beautiful things in the world are always so easy to disappear, they are also more precious.
Just as all the beautiful things in the world are always so easy to disappear, they are therefore more precious.
N3
Charming flame
Charming diamond fire color
When people use "fire color" to describe the color of diamonds, does it imply the "mystery" between diamonds and fire?
What is the fire color of diamonds?
The fire color of a diamond is a colorful brilliance that people can see from all parts of the diamond. The fire color of diamond is also an important factor affecting the value of diamond. Only when a diamond has a good fire color can it fully show its beautiful color.
Only with good fire colors can diamonds fully show their beautiful colors.
The fire color of a diamond can not be separated from the cutting of the diamond, and only the exquisite cutting technology can bring the fire color of the diamond to the extreme. And the standard of a good diamond is not just fire. The quality division of diamonds is based on 4C-4C directly determines the price of diamonds.
0 1# carat weight
Needless to say, the weight (carat, carat, the identification mark is Ct), of course, the heavier the better, the more expensive.
Unit conversion: 1 carat = 1ct= 100 minutes = 0.2g
There is a carat premium on the weight of diamonds, that is, it is much more expensive to buy one 1 carat diamond than to buy two diamonds of the same grade at 50 cents.
02# color color
Color, the international standard, is based on the whiteness and transparency of color, starting from D (color D is the whitest level) and arranged backwards once. The later the diamond turns yellow, there is little demand for N color in the domestic market at present.
D-f: It's extremely white, and you can't tell the difference with the naked eye.
G-h: white.
I-j: yellowish.
What are the authoritative diamond grade certificates?
03# definition definition
Under the magnification of 10, the internal and external characteristics of diamonds are classified. It is often divided into five levels: FL (domestic LC), VVS, VS, SI and P.
Buying suggestion: VS grade is the dividing line of high-quality diamonds. From the perspective of cost performance, SI-VS diamond is recommended. If you like collecting and want to be a friend with strong investment and financial resources, it is recommended to buy VVS-IF diamonds.
04# cutting cutting
That is, the evaluation of diamond cutting and grinding technology,
That is, the evaluation of diamond cutting and grinding technology is mainly divided into three parts:
(1) Cutting-grinding ratio
(2) Symmetrical modification degree
(3) polishing
Horizontal division of cutting:
EX = excellent; VG = very good; G = good; FR = fairness; Poor thing.
The purpose of different cutting is to maximize the light and color of diamonds, so that each diamond can present its best state.
Purchase suggestion: If possible, it is recommended to buy diamonds with three indexes above VG. If the budget is limited, the cutting level can be relaxed.
N4
Identify diamonds
How to identify diamonds
Does the origin of diamonds matter?
At present, the world's major diamond producers are Botswana, Russia, South Africa, Angola, Namibia, Australia, Congo and the United States, among which Australia, Congo and the United States, Botswana, Russia and South Africa account for more than 90% of the world's total diamond production.
No matter what kind of gem, quality must be the most important above any element!
What are the authoritative diamond grade certificates?
At present, there are roughly the following kinds of diamond grade certificates:
GIA diamond grade certificate, issued by GIA.
HRD diamond grade certificate, issued by Belgian Diamond High Council.
AGS diamond grade certificate issued by American Gemological Association.
IGI diamond grade certificate issued by the International Gemological Association.
EGL diamond grade certificate issued by European Gemological Institute.
NGTC diamond grading certificate is issued by the National Jewelry and Jade Quality Supervision and Inspection Center.
GAC diamond grading certificate, issued by China Gemstone Association.
......
The diamond grade certificate issued by the above authorities provides a basis for identifying the quality of diamonds. Do not blindly believe in the origin and brand, only by combining your own ability and consumer demand can you make the best choice!
Michael Faraday, a famous scientist, once talked about "the chemical history of candles" in his famous speech at 1860, and praised candlelight: you have the shining charm of gold and silver, which is brighter than diamonds and rubies. But these things are still not as bright and beautiful as flames. How can diamonds shine like flames?
Now we know the truth: diamonds are flames.
All the beautiful things in the world are connected.
Now we know the truth: diamonds are flames.
All the beautiful things in the world are connected.
D is connected.
Many things in the world are interlinked.
D is connected.