Hanawa mine, Seta, Midori City, Gunma Prefecture, Japan

Gunma Prefecture

Akagi volcano, Kiryu City, Gunma Prefecture, Japan

Anorthite,Augite,Fayalite-Forsterite Series,Hornblende Root Name Group,Hypersthene,Ilmenite,Imogolite,Limonite,Magnetite,Phlogopite,Plagioclase,Tridymite

Kiryu City

Gunma Prefecture

Gunma-tetsuzan (Gunma iron mine), Gunma Prefecture, Japan

Baryte,Jarosite,Limonite,Schwertmannite

Gunma

Gunma Prefecture

Hagidaira mine, Seta, Midori City, Gunma Prefecture, Japan

Manganese

Seta

Gunma Prefecture

Nakanoyama mine, Gunma Prefecture, Japan

Manganese

Gunma

Gunma Prefecture

Nebazawa mine, Katashina, Gunma Prefecture, Japan

Acanthite,Chalcopyrite,Gold,Electrum,Polybasite,Pyrite,Silver,Sphalerite

Katashina

Gunma Prefecture

Okumanza Hot Spring, Kusatsu, Agatsuma District, Gunma Prefecture, Japan

Alunite,Crandallite,Huangite,Natroalunite,Natroalunite-2c,Opal,Pyrite,Pyroxene Group,Quartz,Rutile,Sulphur,Woodhouseite

Kusatsu