Trait
As a gem, you must have three elements: beauty, durability and scarcity. Diamond is the only gemstone that combines the highest hardness, strong refractive index and high dispersion, and is superior to other gemstones.
Cultural factors
Since ancient times, diamonds have been regarded by humans as a symbol of power, majesty, status and wealth.
Mineral deposit exploration
The exploration of diamond deposits often takes decades, even hundreds of years of hard work and labor, and is costly. For example, the exploration of the original Soviet Siberian diamond deposits began in 1913 and was discovered after 18 years; Botswana’s “Eura†primary deposit cost $32 million and was discovered after 12 years; in recent years, in northwestern Canada The number of diamond primary deposits discovered by the Ministry, the number of diamond deposits in the world, can be said to be a few if compared with the amount of iron, copper and gold. Of the diamonds mined, on average only 20% reach the gem level, while the remaining 80% can only be used in industry. But the value of 20% gem-quality diamond is equivalent to five times that of 80% industrial diamond. The world's annual diamond production is about 100 million carats, the gemstone is about 15 million carats, and the diamond is about 4 million carats (800 kilograms). Some rough statistics have found that to get 1 carat (0.2 g) of polished diamonds, about 250 tons of ore need to be excavated.
Mining difficulty
The mining of diamond deposits can be said to be a huge project.
Diamond ring
But the work is carefully prepared. In the mining process, it is necessary to fully exploit the ore containing diamonds, and to ensure that the diamond rough particles in the ore are intact. Improper mining can lead to huge economic losses. Whether it is open-pit mining or underground excavation, it is a huge project with great momentum and scenes, which requires huge human and material resources.
Complex processing
After the mined ore is carefully crushed and sorted, unlike other metal deposits, it can be immediately put into large-scale smelting. Instead, each diamond blank should be carefully and carefully analyzed to determine the undercut plan. To ensure its weight, clarity and style. This often requires people who have a good understanding of the physical and optical properties of the diamond itself and who have considerable experience. The general steps are: design marking; boring; sawing; car drilling; grinding; cleaning grading. And each of these steps includes a lot of small programs. Every small step requires exquisite craftsmanship and rich experience. Take the world's most Cullinan diamonds, the original stone weighs 3,106 carats. Three experienced and skilled craftsmen work 14 hours a day, which takes 8 months to divide it into 4 large diamonds. 101 small diamonds. The processing of some world-famous diamonds often takes only a few months or even 1-2 years to design.
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