How much responsibility should the beautician bear if the necklace is lost in the beauty salon?

The specific compensation scheme is determined according to your cousin's fault and the possible fault of the customer. If the customer has a certain fault, your cousin has only a general fault, and both the customer and the company will bear it. Then the company will decide how much your cousin will bear and how much the company will help bear. In this case, the company is generally responsible, because your cousin is caused by serving customers and is a job behavior. If there is no customer's fault, it will be different according to whether your cousin's fault is general fault or major fault. Generally, the company will compensate for the fault first, and then your cousin will pay part of it, and the company will generally bear the brunt; If it is a gross negligence, the company can generally refuse to pay the advance payment, and your cousin will pay for it alone. However, there may be a beauty salon, and your cousin is right. This is the fault of the client, or the company may lose some money. It depends on the specific circumstances.