According to whether the jewelry is inlaid with gems or not, it means that jewelry can be divided into inlaid gems and jewelry, pure decorative gem material jewelry and plain gold jewelry. Plain gold jewelry can also be divided into pure gold jewelry, K gold jewelry, platinum jewelry, and sterling silver jewelry. Compared with inlaid gemstones, the value of this type of jewelry is determined by the type and content of the metal used, the design style and the production process.

Gold jewelry, the main ingredient is gold, the content and composition of gold reflect the value of gold jewelry. Gold jewelry includes pure gold (99.9%), pure gold (99%), K gold, gold-plated (gold-clad) and other categories.

Platinum jewelry, the main components are platinum group elements such as platinum (Pt), palladium (Pd), nails (Ru), osmium (Os), rhodium (Rh) and iridium (Ir). The most common main platinum jewelry is platinum (PT999.5), pure platinum (Pt990), and platinum (Pt950, Pt900, Pt850) jewelry with platinum (Pt) as the main component.

Silver jewelry, the main component is horns. Commonly used are 800S for gem inlay, jewelry silver 925S or 950S (where S is the abbreviation of silver in English, 800S means that the fineness of silver is 80%; 925S and 950S, respectively, mean silver The fineness is 92.5% and 95%).

Ordinary metal jewelry, made of various alloys of stainless steel, copper and aluminum, is mainly used in fashion jewelry or avant-garde jewelry.

Jewelry made of other materials mainly refers to jewelry made of various leather, plastic, wood, etc., which are usually used as handicrafts to embody the beauty of art.