Shirakawa , which is a black - speckled granite from Kyoto , Japan , was prized for its ability to hold raked grooves .
Shirakawa , which is a black - speckled granite from Kyoto , Japan , was was previously used in Oregon 's Japanese Garden .
Shirakawa , which is a black - speckled granite from Kyoto , Japan , was prized for its ability to hold raked grooves and was previously used in Oregon 's Japanese Garden .