tangible property

Diamonds have the highest hardness and high brittleness among natural minerals, so they will break when they collide with each other. From the ancient Greek agonist, which means hard and inviolable substance, it is recognized as the king of gems. Diamonds In other words, diamond is actually a kind of carbon crystal with quite high density.

Card, or translated as carat, carat, is the quality unit of diamond. One card is 200mg. According to legend, in the early days, the diamond was weighed by the fruit of carob tree, and one such fruit weighed about 200mg. Because the density of diamonds is basically the same, the heavier the diamond, the bigger the volume. The bigger the diamond, the rarer it is, and the higher the value of each card.

According to the American Physicist Organization Network, researchers at Macquarie University in Australia have found that the hardest natural diamond on earth is not as "eternal" as people think. In strong light, diamonds will also evaporate. The research results were published in the American magazine Optical Materials Letters.

Richard Midron, an associate professor at Macquarie University's Photonics Research Center, and his colleagues found that diamonds evaporate when exposed to light.

Midron said: "Some substances have light-induced evaporation, which is the first time to be observed in diamonds." When exposed to strong ultraviolet -C rays (strong ultraviolet rays filtered by the ozone layer), the pits on the diamond surface will disappear in just a few seconds. With the decrease of light intensity, the speed of diamond quality loss decreases rapidly, but the etching process continues, but the speed is getting slower and slower.