Translate Seal Characters to Mandarin? Picture #2 (Characters identified: 青鸞舞鏡)
as droooze indicated, the characters are “青鸞舞鏡“ ( read from top right, bottom right, top left, bottom left).

the 國語辭典 has the entry: 青鸞

the third explanation is:


  傳說青鸞喜歡對鏡起舞，故用以代稱鏡子。


so, i guess the seal is on frame of a mirror, is it?