A discrimination medium 10a includes a first double layered body 101 having a right-handed circular polarization polymer cholesteric liquid crystal layer 11 and a left-handed circular polarization polymer cholesteric liquid crystal layer 12 which are stacked. The right-handed circular polarization polymer cholesteric liquid crystal layer 11 reflects a specific right-handed circular polarization light, and the left-handed circular polarization polymer cholesteric liquid crystal layer 12 reflects a specific left-handed circular polarization light. The discrimination medium 10a is applied to the article 30, and is viewed via a simple determination tool 20 having a filter 21 allowing only right-handed circular polarization light to pass therethough and a filter 22 allowing only left-handed circular polarization light to pass therethough. As a result, the color of the right-handed circular polarization polymer cholesteric liquid crystal layer 11 is seen via the right-handed circular polarization light filter 21, and the color of the left-handed circular polarization polymer cholesteric liquid crystal layer 12 is seen via the right-handed circular polarization light filter 22. This unique phenomenon by the discrimination medium 10a which cannot be copied in general is confirmed, so that the authenticity of the article 30 can be determined easily and reliably.