Beauty, longevity and rarity. Jewelry can't be a gem if it is not beautiful. This kind of beauty is manifested in gorgeous colors. Its texture is hard and wearable, and it can be used for a long time. It is rare, and rare things are precious. Emeralds are extremely rare in the world. Jewelry in a narrow sense refers to jade products, while jewelry in a broad sense should include jewelry, handicrafts or other treasures with certain value made of gold, silver and natural materials, collectively referred to as jewelry. "