First, the principle of beauty, the biggest function of jewelry and jade is decorative function, if it is not beautiful, it is meaningless. Jewelry and jade are beautiful gifts of nature and the essence of natural minerals. The beauty of jewelry is irreplaceable by other things. No matter what kind of jewelry it is, it has no value if it is not beautiful, and beauty is the greatest value of jewelry. Jed is famous, right? Good jade is sky-high, but poor unattractive jade is also very worthless, so the choice of jewelry collection mainly depends on whether it is beautiful or not.
Second, the principle of hardness, most gems are relatively hard. The Mohs hardness of the hardest diamond is 10, followed by rubies and sapphires with hardness of 9, emeralds and golden green cat's eyes with hardness of 8, jadeite with hardness of 7, most crystal agates with hardness of 7, and Hetian jade with hardness of 6, among which organic gems such as pearls (hardness of 2.5-4.5), corals (hardness of 3.5-4) and opals (hardness of 5-6). Hard things are not easy to damage, stable in nature and can be preserved forever. Organic gemstones are fragile, so be careful.
Third, the principle of rarity, the gem resources in nature are non-renewable resources, some are rare, some are abundant, and the rarer things are more valuable and more expensive. Without natural resources, there would be no such thing. Don't hesitate to meet something you particularly like. If you miss it, it will be difficult to meet again. The jasper in pit seven is not expensive, and now it is extinct. Madagascar's marine chalcedony and beautifully photographed bracelets are now gone. The former Liangshan Nanhong was also short of raw materials and the price was extremely high. Nowadays, it is unpredictable in the market ... Relatively speaking, gold is abundant, not a rare thing, and the price of gold is high. There are also large reserves of diamonds. Diamonds conform to the two principles of beauty and hardness, but their rare properties are greatly reduced. If you collect diamonds, it is recommended to collect colored diamond with good color, large particles and rarity, which will have a good value-added potential.