Tinzenite from Honshu Island, Japan
Japan | |
| Dr. Matsuo Nambu collection (curated at Geological Survey of Japan) |
| Toyofumi Yoshimura, "Manganese deposits in Japan - Addendum, PartII", Science reports, Department of Geology, Kyushu University (1969) |
| Dr. Kameki Kinoshita collection (curated at Geological Survey of Japan) |