Diamonds are appreciated not only in jewelry, but also in demand in industry. They are used in optics, electronics, for the manufacture of drills, cutters of special strength. Interestingly, the value of mined diamonds is only 10% of the income received after the work of jewelers and resellers.
10 interesting facts about diamonds
- Diamond is the hardest natural material on earth. This does not mean that it does not break or shrink. If a diamond is placed in a microwave oven and the temperature is raised to 763 degrees Celsius, it will simply disappear without a trace. Nothing will remain in the microwave, only the carbon dioxide that has been produced in the process.
- In 1814, Humphrey Davy and Michael Faraday proved conclusively that diamond is a chemical relative of coal and graphite.
- Soviet physicist Ovsey Ilyich Leipunsky was the first in 1939 to perform thermodynamic calculations of the graphite-diamond equilibrium line, which served as the basis for the synthesis of diamond from a graphite-metal mixture in high-pressure apparatuses. This method is still used today.
- A diamond takes a long time to form. They form underground for over a billion years at a depth of 150 kilometers within the earth's crust. Later, they rise to the surface during volcanic eruptions or are washed out by underground rivers.
- Diamond is 58 times harder than the second strongest corundum stone. People tried many ways to cut diamonds, and later discovered that the only way was to use another diamond.
- The cut diamond has been the most popular and expensive gemstone for many decades. Interestingly, the price of a diamond is due to the extremely high monopolization of this market. In fact, the cost of diamonds is about $ 100 per carat.
- The largest diamond in the world is the Cullian. This lump was found in South Africa. Before cutting, it was weighed and received a weight of 3000 carats. Later, diamonds were made from it for the Big Star of Africa, the Small Star of Africa and other jewelry. The diamonds weighed 530.2, 317.4 and 104 carats, respectively. Smaller diamonds are now part of the British royal regalia.
- One of the important properties of diamonds is luminescence. Under the influence of sunlight and especially cathode, ultraviolet and X-rays, diamonds begin to luminesce - they glow in different colors. This property is widely used in practice to extract diamonds from rocks.
- In order to distinguish a real diamond from an imitation diamond, a special "diamond probe" is used to measure the thermal conductivity of the stone being examined. Diamond has a much higher thermal conductivity value than diamond substitutes.
- Blue diamonds are the rarest, for every 10, 000 mined diamonds, there are only 1-2 blue diamonds. Boron atoms trapped in its structure give this shade to the stone.