用于判断琥珀的测试: Floats in the salt water, sinks in fresh water; Acetone resistant; Has characteristics of pine resin odour if heated; Has a characteristic colour under UV rays.
用于判断琥珀的测试: Floats in the salt water, sinks in fresh water; Acetone resistant; Has characteristics of pine resin odour if heated; Has a characteristic colour under UV rays.