유리두금(瑠璃兜錦, 碧瑠璃兜丸錦) Astrophytum asterias var. nuda
  
                                            유리두(瑠璃兜, 碧瑠璃兜丸) Astrophytum asterias var. nuda

  
                              유리두 철화                                                               (복능) 유리두 철화

 유리두금(瑠璃兜錦, 碧瑠璃兜丸錦) Astrophytum asterias var. nuda 
                   유리두금(瑠璃兜錦, 碧瑠璃兜丸錦)                                               유리두금