1, characteristics

As a gem, it must have three elements: beauty, durability and rarity. Diamond is the only gem with the highest hardness, strong refractive index and high dispersion, which is superior to other gem varieties.

2. Cultural factors

Diamonds symbolize power, majesty, status and wealth. In addition, diamonds are beautiful and rare, and they are also a symbol of love and loyalty, representing eternal love.

3. There are few mineral deposits.

The exploration of diamond deposits often requires decades or even hundreds of years of hard work and labor, and the cost is high. Compared with the number of iron, copper and gold mines, there are only a handful of diamond deposits. According to rough statistics, it is found that it takes about 250 tons of ore to get 1 carat (0.2 g) polished diamond.

4. The excavation is difficult.

In the process of mining diamond deposits, it is necessary to fully exploit the diamond-bearing ore and ensure that the original diamond particles in the ore are intact. It is a huge project with a huge momentum and a grand scene, which requires huge manpower and material resources.

5, the processing is complicated

After the mined ore is carefully crushed and sorted, it is necessary to carefully analyze each diamond blank one by one, so as to determine the undercut polishing scheme to ensure its weight, cleanliness and style. The general steps are: designing the marking line; Split drilling; Saw drill; Turning bit; Grinding drill; Cleaning and grading. And each step also includes many small programs. Every small step requires exquisite technology and rich experience.

Refer to Baidu Encyclopedia-Diamonds (Gems) for the above information.