The authenticity of materials can be tested by the National Jewelry and Jade Quality Supervision and Inspection Center or an inspection agency recognized by the AQSIQ. As for the historical and cultural value, I'm afraid we can only find experts to evaluate it. Famous auction companies, or institutions like the Palace Museum, all have jade experts.
Generally speaking, you can go to a professional jade appraisal institution to identify jade bracelets.
A drop of water can identify the authenticity of a jade bracelet. Drop a drop of water on the surface of the jade bracelet, and it will not disperse after a long time. It's a real jade bracelet, and the fake jade bracelet will soon disappear. You can also touch it with your hands. The real jade bracelet will feel cold and lubricated, but the fake one will not. You can also lick the jade bracelet with the tip of your tongue.
Jewelry and jade comprehensive testing center. Professional laboratory of local land exploration department.