Abstract "Diamond 10,000 carats". This is the original words of a Taobao shop owner. This is not a gimmick, he is serious. Maybe you will say: By, who will buy 10,000 carats of diamonds in Taobao? Do you know how much 10,000 carats of diamonds?
"Diamond 10,000 carats." This is the original words of a Taobao shop owner. This is not a gimmick, he is serious. Maybe you will say: By, who will buy 10,000 carats of diamonds in Taobao? Do you know how much 10,000 carats of diamonds?
I really can't tell you exactly how much 10,000 carats of diamonds, I only know that a certain diamond retail price is 29 yuan per 100 carats, a large amount of discount, so 10,000 carats will not exceed 2,900 yuan.
Of course, he is not selling large diamonds suitable for jewelry, but small pieces of synthetic diamonds. You can also call it diamond abrasive grains, or diamond fine sand, but it is indeed diamond, chemical composition. It is carbon simple, transparent and high hardness.
A slightly larger synthetic diamond, slightly yellow, about 4 mm in diameter, Taobao retail price of 20 yuan. 6 mm is more expensive and may sell for more than 40 yuan. Some have been installed on a metal handle, called a diamond turning tool, or a diamond grinding wheel correction pen, ranging in price from five yuan to hundreds of yuan.
Diamond is no longer a valuable thing, it is very cheap.
Do you know which country in the world has the highest diamond output? South Africa? Congo? wrong.
The country with the highest diamond production in the world is China, accounting for 90% of the world's total production. It is estimated that China's total diamond production in 2014 is at least 7 billion carats.
These diamonds are basically used in industries such as machinery manufacturing, mining, and construction. Diamond grinding wheels for cemented carbide in the factory, diamond cutting blades for civil workers cutting tiles, and diamond polycrystalline drill bits for drilling are made of synthetic diamond.
So why is the diamond ring selling so expensive? ? ? ! ! !
Ah, it is because the people are stupid, they will spend a lot of money to buy those useless things.
To earn money, diamond traders must first create a diamond culture. Their copywriting will remind you for decades: diamonds are the most precious gems, diamonds symbolizes being together forever, marriage is called diamond marriage for 60 years, quality unmarried men are called diamond kings, good men should be for women. Buy diamonds.
How can such a symbol of love be a small stone that is irrelevant? When you are hungry, do you really think that a diamond is heavier than a pancake fruit?
For ordinary people, diamonds have no practical value. Although the thing is hard, it can't even be done with a knife. For the past few thousand years, it has been almost completely useless except as an ornament.
The price of diamonds is still rising. The diamonds used in jewelry are in short supply. Diamonds have drawn a curve of rising prices, telling you that diamonds can be invested and preserved. They also constantly stressed that the diamond mine is about to be finished, and now it is not investing in diamonds. In the future, it is not the price.
Dear, how stupid are you, will you feel that diamonds are suitable for preservation and investment?
If you pay a little attention to the technology of synthetic diamonds, search for the development of synthetic diamond technology, it will not be stupid to this point.
There are many people in China who study synthetic diamond technology. There is a Henan University of Technology (a university that most Chinese have never heard of), and the university's laboratory has made some synthetic diamonds with a diameter of more than 8 mm, which is the raw material that can grind 2 carats of diamonds.
Some jewelers say that synthetic diamonds have many flaws and cannot be as hard as natural diamonds.
Let me tell you one thing first: In December 2010, researchers at Ehime University in Japan collaborated with Sumitomo Electric Industries Co., Ltd. to successfully synthesize the world's toughest diamond, which is more than 1 cm in diameter (can do 3 carats). A cylindrical diamond was named "Yu Shi". Researcher Jin Zheman said that Yuanshi is currently the hardest artificial diamond in the world. It is much harder than ordinary diamonds. As an industrial product, its life span is several times longer than ordinary diamond.
Some people may know that diamond identification methods include optical method, specific gravity method, hardness method, thermal conductivity measurement, chemical composition measurement... measured by these methods, Yuanshi is consistent. If Yuanshi is used as the diamond hardness standard to measure other diamonds, the natural diamond may be judged as inferior.
Those who believe that diamonds will not fall in price say that it is impossible for laboratory things to replace natural diamonds as jewelry materials.
Let me tell you the latest developments in this field:
A Chinese-American scholar named Mao Heguang uses a small diamond as the base for chemical vapor deposition (CVD) to deposit carbon molecules in methane onto the diamond substrate. Synthetic diamonds accumulate layer by layer. Based on the base, it quickly “grows upâ€. Mao Heguang’s students once took a 2-carat CVD diamond that was “long†in a week to an expert with the GIA American Gemological Institute’s qualification for jewelry identification. The expert gave an estimate of $200,000 – experiment The purity of the diamonds from the epitaxy in the room is not comparable to natural gemstones at all.
You should be able to believe in the technical level of an expert qualified for GIA. The diamond worth $200,000 grew up in just one week in a stove. What is the production cost of this diamond? It is said to be far less than $5,000. Of course, this is not the biggest diamond they have ever made, they have already done a big diamond of 10 carats.
What is the raw material for making diamonds? Dr. Mao Heguang said to those who regard diamonds as treasures: "For example, cow dung." He is not a joke, he uses methane as a raw material. Methane can be completely fermented with cow dung, but it can also be done with human stools.
If you are familiar with semiconductor manufacturing technology or know some materials science, you may know that CVD equipment is not expensive. If the parameters are stably controlled, diamond-making CVD furnaces can be mass-produced at very low cost.
Thirty years later, you can play with the CVD stove DIY diamonds used by Taobao buyers. The plug is connected to a 220 volt power supply and the gas pipe is connected to your home's natural gas pipeline (the cost of natural gas may be cheaper than cow dung biogas). This stove is as big as a refrigerator, with five floors, each with 200 grids, each with a 0.1 mm diamond sand. Two weeks after the start-up, 1000 diamonds of 10 carats were produced. After calculating the electricity and natural gas fees, it cost a total of 800 yuan, and the cost per diamond is eight cents. As for the 10-carat diamonds that are mass-produced at the factory, the cost may be reduced to three cents a grain.
Of course, there may be some deadly environmentalists who insist on using cow dung, shit and human stools to make diamonds, which they call "natural raw organic diamonds."
Those who spend hundreds of thousands of dollars to buy a big diamond probably don't believe that technology will develop so fast.
Let's review history.
The most famous materials that pretend to be diamonds are cubic zirconia and moissanite. Pure natural zirconia is of poor quality. Since the invention of artificial cubic zirconia 40 years ago, it has found the best gemstone to replace diamond: cubic zirconia can be polished better than real diamond. A one-carat zirconia drill with 8 arrows and 8 hearts is sold for only 7 yuan on Taobao. If you are interested, you can even order a "large diamond" with a diameter of one foot.
Moissanite is a large grain of silicon carbide single crystal. The price of man-made Moissanite is less than one-tenth of that of diamonds. It used to be a very rare thing. At least it is much rarer than diamonds, because only some craters can find Moissanite, and there is almost no transparency. The first piece of natural silicon carbide single crystal was discovered by Dr. Mosang in a crater in Arizona in 1904, so it was called Moissanite.
Moissanite has a Mohs hardness of 9.2, which is very close to diamonds. Thermal conductivity and specific gravity are similar to diamonds, and you can fool some diamond testing tools. What's more, Mozambique has a higher refractive index than diamond and a larger dispersion than diamond. Therefore, Moissanite is brighter and more colorful than real diamonds, "more diamonds than diamonds." If you don't use a tool such as a magnifying glass to look at his refraction of light, people can't distinguish between Moissanite and diamonds by the naked eye and simple tools.
If you just look at diamonds as jewelry, why bother care if it is cubic zirconia or moissanite? Anyway, these two things can be polished better than diamonds. When the 10 carat diamonds are reduced to a dollar, Taobao shopkeepers may use diamonds to impersonate moissanite and zircon. At that time, you must give a bad review.
A few decades ago, pearls were considered treasures. Look at the price to Taobao, the price of Meiyu Pearl Powder today is 19.8 yuan 2 packs (90 grams per pack). Pearls need to be produced by river rafts, which is regarded as aquaculture. In the future, diamonds are industrialized and mass-produced fully automatically, which is necessarily cheaper than pearl powder. In the future, some people may think that the smog caused by farmers burning straw is a headache. It is better to concentrate the straw to make biogas and then use biogas to make diamonds. An acre of rice can produce 10,000 pounds of straw, the carbon in the straw turns into a diamond, and the straw in an acre can produce hundreds of kilograms of diamonds. In the future world, people use diamonds for glasses, diamonds for car glass, diamonds for rice bowls, diamonds for bathtubs, and diamonds for toilets. - Of course, Dr. Mao Heguang is not as optimistic as I am, just saying that the future era is the era when diamonds replace silicon.
If you have spent a lot of money on buying a diamond ring for your woman, don't regret it. Most women are not interested in practical things, you have to spend a lot of money to buy something completely useless to marry her, in order to let her believe in your love. Therefore, you spend hundreds of thousands of dollars today to buy a diamond worth only eight cents in the future to make her happy, this is true love. When you are on the diamond wedding anniversary, she will take out the diamond ring worth eight cents, and gently think of the money you had proposed to earn money for the diamond ring. He almost died at the age of 28.
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