1. At present, there is an authoritative appraisal institution with national qualification certification in Ningbo, whose name is Ningbo Product Quality Supervision and Inspection Institute, No.2 Wang 'ai Road, jiangdong district, Ningbo. Generally, it takes two hours to authenticate the authenticity of jade, and the cost is 20 yuan. For detailed telephone numbers, you can use the name of Baidu organization.

2. Yes. The Physical and Chemical Center of Ningbo Quality Inspection Institute has jewelry testing service, so it is possible to identify jadeite. The Physical and Chemical Center of Ningbo Quality Inspection Institute is located in Room 408, Block D, Quality Supervision Bureau, Jiangnan Road 1588, Yinzhou District, Ningbo City, Zhejiang Province, and can be reached by subway and bus.

3. That kind of appraisal certificate can't be free. General jewelry stores have this kind of business. The landlord should contact a bigger jewelry store himself. There are many in Ningbo.

4. Zhejiang Precious Metal Jewelry Quality Testing Center. Zhejiang Precious Metals and Jewelry Quality Testing Center is located on the 5th floor of Langguan Building, No.2 Ma Yuan Road, Haishu District, Ningbo City, Zhejiang Province, and there is also a gold jewelry testing center, whose address is Langguan Building, No.2 Ma Yuan Road, Nanmen Street, Haishu District, Ningbo City, Zhejiang Province.