Scolecite

• Scolecite
  Locality: Makino-gawa, Ehime-ken, Japan
  
  This sure is a fantastic artwork of nature.
  A former curator of the National Science Museum,Takaharu Imayoshi, whose achievement introduced in our “Mineral Collection Corner”, had traveled to Ehime-ken several times in his last years. Presuming from his notebook with many detailed descriptions, he seems to have studied especially on zeolite group then.
  This might be one of his memorable specimens.