01 / Suzuishi
A stone called a bell stone for its sound when shakenis a national natural monument with Takashi-kozo.
Nayoro Suzuishi is a kind of limonite thought to form as iron wraps around a clay core like a shell. Most are about fist-sized and rattle when shaken. Takashi-kozo are cylindrical tubes, about 1 to 6 cm across. Both became national natural monuments in 1939, and the specimens are held at the Kitaguni Museum.
- Natural monument (designated 7 Sept 1939)
- Suzuishi mostly fist-sized
- Takashi-kozo about 1 to 6 cm across

