The Prehnite, known in Japanese as Budouseki (prehnite, grape stone), is one of the Spirit Stones that Mio Amakura can find in All God's Village in Fatal Frame II: Crimson Butterfly. The stone can be found on top of a box in the Underground Passage, beneath the Osaka House. When played using the Spirit Stone Radio, the voice of one of the boys playing tag can be heard. When hiding, he was killed by the darkness. He hid in the box hoping someone would find him.