Searching online.....

... because Alex's latest stone photo reminded me of something, I came across this.

The Chichibu Chinsekikan

Address: Japan, 〒369-1872 Saitama, Chichibu, Kamikagemori, 764-6

https://www.japantimes.co.jp/news/2016/11/29/national/online-fame-drives-visitors-saitama-museum-sporting-rocks-faces/#.XKt9UujYo1I

 Don't forget to visit when you are in Japan Alex!