Jewelry has a broad sense and a narrow sense. Jewelry in a narrow sense refers to jade products. Broadly speaking, jewelry should include jewelry, handicrafts or other treasures made of gold, silver and natural materials (minerals, rocks, organisms, etc.). ) and has certain value. Therefore, there was a saying of "gold and silver jewelry" in ancient times to distinguish gold and silver from jewelry. According to the general business habits at home and abroad, jewelry is divided into the following categories: namely, jewelry is divided into five categories. The first category is jewelry, including diamonds, rubies, sapphires and emeralds. The second category is precious metal ornaments, including gold, platinum and silver. The third category is pearl ornaments.

The above three categories are classified as precious jewels. The fourth category is semi-precious stone ornaments, including opal, amethyst, topaz, jadeite, jadeite, tourmaline (tourmaline), garnet, black stone, opal, coral, agate, tiger's eye, and others such as emeralds. Among semi-precious stones, some high-quality ones, such as jadeite, black opal, amethyst and alexandrite, are not cheap. The fifth category is artificial jewelry, including shells, enamels, cloisonne and artificial gem, such as artificial diamonds, artificial rubies, artificial sapphires, artificial emeralds and artificial jadeites. 5. Parity metals, such as copper, gold plating, copper combination gold, and other gold ornaments.