1, M-button (W-button): This is a very classic button style. Because of its movable design, it is very convenient to open or close. You just need to break it aside to open it, and the M key is also very classic, which won't hurt the neck skin.

2, S buckle: S buckle is actually similar to M buckle, and it is also a movable mouth design. Opening is also opening and closing, so the S buckle will be simpler and won't steal the limelight of the necklace.

3. Lobster buckle: Lobster buckle is similar to a key chain, but smaller, more convenient to wear and durable.

4, spring buckle: spring buckle and lobster buckle are very similar, but there is still a difference between the two, lobster buckle will be larger, like lobster pliers.

5. Concealed button: Concealed button, as the name implies, is an invisible button shape, hidden in the dark. The buckle is fixed by clamping the spring piece into the groove. This kind of hidden buckle is mainly used in some big-name jewelry, which is more exquisite and diversified and can increase the aesthetic feeling of jewelry.

6. turnbuckle: turnbuckle is a buckle that is screwed up like a screw. This kind of buckle is mainly used in low-end necklaces, and its appearance is not beautiful enough.

7. The characteristics of gold include easy forging, easy extension, no oxidation, no discoloration and no loss. However, due to the difficulty of mining, its value is also expensive. Gold is also a special commodity, which has the dual attributes of monetary goods and non-monetary goods.