People have been favoring gold for thousands of years, but it was not until the 1920s that gold could be colored. Ancient civilizations used to mix gold with other metals, but only to increase its strength rather than to change the color. In the Second World War, platinum people have been favoring gold for thousands of years, but it was not until the 1920s that gold could be colored. In ancient civilizations, gold was mixed with other metals, but only to increase its strength rather than to change colour. Platinum was used as a strategic material in World War II, and many jewelry companies used platinum as a substitute. To become platinum, gold and white metal must be mixed and bleached. These metals include silver and nickel. Silver was often used before, but it loses its luster after a long period of time. Nickel is forbidden to use because it is easy to cause allergies. White metal mixed with non-allergenic palladium is now the most popular. At the same time, modern technology has enabled gold to have various colors such as blue, brown, green and even purple. Imagination is the driving force in jewelry design. Technology only makes the production process easier and more precise, but it can never replace creativity. We can understand the development of the jewelry industry in the 21st century. Of course, there will be more and more advanced methods to deal with gems and metals, and to discover new gems. Human design limitations will also be challenged, of course partly due to the limitations of human nature. But more importantly, people who grew up in the 1960s and their ancestors have different aesthetic concepts. Only time will tell me what will happen in the future. Previous: Jewelry processing tricks of stealing gold under the nose Next: The difference between pure gold, K gold, K platinum, platinum and platinum