2, rubbing beeswax on clothes can attract small pieces of paper.

3. Take it to CMA Jewelry Appraisal Center to measure refractive index, density, etc.

4. The best test method: visual inspection, ultraviolet irradiation, hand feeling and salt water.

5. Even if other methods are more or less true, they will do some harm to amber.

6. The above identification methods can't be used alone, and multiple detection methods should be used for layer-by-layer separation to eliminate the false and retain the true!