What kind of rough stone is the best? Mainly depends on the appearance and beauty. Diamonds are like skin. If you touch the original diamond, you can feel the difference. Every diamond has a different skin.
The different smoothness of diamonds will affect the refraction of light on the surface of diamonds. Diamonds have natural colors and beautiful colors under different light refraction.
Most rough diamonds are not luminous, and only after polishing will they be thoroughly remoulded. But there are also many people who like unpolished rough stones and think that rough stones are particularly energetic.
This kind of rough stone is natural beauty, without any acquired modification and processing, with the imprint of time.
Diamond masters will choose their favorite diamonds for designers to choose from. If not selected, those rough diamonds will become collections and may be used in other series.
"I won't limit my choice because of design. I will go out and choose as many beautiful diamonds as possible. "
Formation conditions and classification of diamonds
Diamond refers to polished diamond, which is a natural mineral and the original stone of diamond. Diamonds are also divided into gem-grade diamonds and industrial-grade diamonds. Generally, the diamond formation conditions are pressure of 4.5-6.0Gpa (corresponding to the depth of 150-200km) and temperature of 1 100- 1500. Although diamonds can be formed in various periods/stages of the earth's history in theory, most of the mines currently mined were mainly formed in two periods: 3.3 billion years ago and12-1700 million years ago. For example, some diamonds in South Africa are about 4.5 billion years old, indicating that these diamonds began to crystallize in the deep part of the earth shortly after its birth. Diamonds are the oldest gems in the world. The formation of diamonds needs a long historical process, which can be confirmed by the fact that diamonds are mainly produced in the ancient and stable mainland areas of the earth. In addition, the impact of extraterrestrial stars on the earth can produce instantaneous high temperature and high pressure, and can also form diamonds. For example, the report of the former Soviet Academy of Sciences 1988 found diamonds in meteorites, but the diamonds formed by this action have no economic value.
Morphology of diamond rough stone
Most rough diamonds look like ground glass, with crystal defects and pits on the surface, etched lines, hard texture, mostly white or ivory, and little transparency.
Diamonds will also evaporate
Diamonds evaporate and disappear very slowly, which is usually invisible. In fact, even if exposed to strong ultraviolet rays, such as strong sunlight or ultraviolet rays, the quality loss of diamonds will take about 654.38+0 billion years to reach an observable level.
Industrial grade diamonds and gem grade diamonds.
Natural diamonds are extremely expensive. Generally, a few grams of crystal is a fine product, and the price is far above gold. Industrial diamond is manufactured artificially, and it is generally converted from graphite at high temperature and high pressure, and the obtained diamond particles are fine, so it is black.
A marketing scam for diamonds?
In a word: "Diamonds last forever, and one lasts forever", which links diamonds with love. Diamonds are more like disposable consumer goods, which leads to a very low circulation rate of second-hand diamonds. The ignition point of a diamond is only 800 degrees, and a fire can instantly turn the diamond you bought at a high price into carbon dioxide. If there is anything commendable about diamonds, I'm afraid it's only their hardness. The hardness of diamond is the highest among natural minerals, and it is difficult to leave scratches when touching other objects. Therefore, in industry, scientists will use high temperature and high pressure to synthesize diamond particles for sandpaper, drilling, grinding and cutting tools, such as … ...
What do you think of the value of diamonds?
What do netizens think?
When it comes to diamonds, the first thing people think of is expensive and shiny. Diamond has the highest hardness among natural substances, and its refractive index and dispersion value are also the highest among all gems, so it looks extremely shiny. So diamonds are shiny, too? Actually, it is not. Most of the rough surfaces of diamonds are pitted, not shiny, not dazzling, but slightly waxy. Among them, it can be divided into gem grade and industrial grade.
For example, the following rough embryos are black and brown in color, and the definition is not good. This is not the point of black diamonds. Generally, it can only be used for industrial or low-end jewelry.
What kind of rough embryos are the sparkling diamonds in those jewelry stores? I think we can talk about the origin of diamond mines first. First of all, diamond is very hard, because it is a simple substance of elemental carbon and has a tetrahedral cubic structure. Because of its single composition and structure, there is little difference in diamonds from different mining areas. Diamonds generally have no place of origin, unlike rubies, emeralds and other gems, with different places of origin and huge price differences. At present, diamonds are mainly produced in Russia, Botswana, Namibia, Australia, Congo and other places. South Africa, a traditional diamond producing country, did not produce so much raw ore in the past because of its early mining. Of course, most diamond mines in the world, especially those in Africa, are mainly controlled by De Beers. Diamonds were found behind Russia. According to the personality of the old Russians, it is certainly impossible to control diamonds in the hands of others, so Elosa in Russia is also an extremely powerful diamond company. At present, the raw ore in pink diamond is mainly produced in argyle mining area. It can be said that the original diamonds are widely distributed, and the output in Shandong and Liaoning provinces of China is also very small. For example, the famous Changlin diamond is produced in Shandong. So what is the gem-grade diamond raw ore like? Generally speaking, gem-grade rough diamond ore is translucent, and high-quality rough diamond ore is octahedral, which can just cut two round diamonds in half.
Of course, some rough mines are very beautiful, especially some colored rough diamonds, such as the huge yellow diamond rough mine below.
Although the main component of diamonds is elemental carbon, natural things also have impurities. Good diamond impurities need to be seen under a microscope, such as:
This is the crystal inside the diamond, which is actually a beautiful octahedral shape.
So how did the mediocre raw ore become a dazzling diamond? In ancient India, because diamonds were the hardest, they could only be polished with diamonds and diamonds. Now, with lasers and various cutting instruments, as well as computer drawing and measurement, everything becomes much easier. Of course, all this is inseparable from the design of experienced cutting masters. For example, the following video can be used as a general reference.
Diamonds are very inconspicuous, mostly similar to ground glass, with perfect and transparent crystal form, and most of them have crystal defects such as etching lines and pits. The color is also very different.
According to the use, it can be generally divided into gem-grade diamond rough stone and industrial-grade diamond rough stone.
Speaking of diamonds, I think everyone will be familiar with them. Diamonds cut into perfect geometric shapes shine with dazzling light, symbolizing unswerving love and touching thousands of women.
So what is the original stone of a diamond like? I'm afraid many people haven't seen it. First, let's learn about diamonds. Its mineralogical name is diamond and its chemical composition is carbon. It is also the only gem in nature that consists of a single element. The crystal morphology of the original stone is mostly octahedron, rhombic dodecahedron, tetrahedron or the aggregate of these shapes.
Next, let's see what the original diamond looks like in nature!
Does it look like crystal rock sugar? But unlike rock sugar, diamond is the hardest substance found in nature at present.
Octahedral diamond rough stone
Cubic diamond rough stone
Complex crystal diamond rough stone
After reading so many pictures, I believe everyone has a preliminary understanding of the original diamond. If you meet such a stone in the wild next time, you must pick it up and put it in your pocket. Don't throw it away as an ordinary stone!
The rough stone is an uncut diamond, which is a mineral made of pure carbon. However, primary diamonds are mostly cubic, octahedral and rhombic dodecahedron, with triangular pits, growth hills and other structures on the surface. It is the most precious diamond in the world, and it is also the only gem composed of a single element.
Diamond rough refers to uncut diamonds, and diamonds are also called "Jin Gangzuan". It is a mineral composed of pure carbon and the hardest substance in nature, with a hardness of 10.
Diamond rough stones are generally cubic, octahedral and rhombic dodecahedron, and structures such as triangular pits and growth hills often appear on their surfaces. This kind of gem was formed by long-term geological process at high temperature and high pressure.
Diamond is the most precious gem in the world, and it is also the only gem composed of a single element. Its performance is very stable, it is not easy to dissolve in acid and alkali at room temperature, and it will not fade after long-term wear.
The original stone of a diamond is irregular.
This is a stone.
This is a natural diamond (10 carat)