Diamonds existed long before life appeared on the earth. Now the natural diamonds on the market have a history of billions of years, and the youngest ones have hundreds of millions of years, which can be said to be a very long history. Natural diamonds are formed at a depth of more than 100 km below the surface. They were brought to the surface by magma through volcanic eruption, and the formation process was not simple. Since the first natural diamond was discovered in India thousands of years ago, diamonds have been endowed with pure, rare and precious characteristics. As early as15th century in Europe, the Duke of Austria proposed to the French princess and made the world's first diamond ring for marriage proposal, which was endowed with precious emotional value of love and commitment. Since then, natural diamonds have been closely linked with faithful love. On the other hand, there are fewer and fewer kimberlite mines containing rough diamonds, which have not been found in the past ten years, so the diamond output is also decreasing. According to statistics, the annual diamond production of 1 carat in the world is only the size of a fitness ball, and the annual diamond production of 5 carats and above is only the size of a basketball. It is estimated that there will be no natural diamonds in 20 years, and its rarity and preciousness are extraordinary!