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Explore Gunma Prefecture, Prefecture Kanto, and more!

Jimboite, Mn3B2O6, Rito Mine, Gunma Prefecture, Kanto Region, Honshu Island, Japan. Dark brown veins, grains and masses in a lighter pinkish brown rhodochrosite matrix (with possible some galaxite)

Henmilite Fuka Mine, Bitchu-cho, Takahashi, Präfektur Okayama, Region Chugoku, Insel Honshu, Japan Taille=1.3 mm Copyright Luigi Mattei

Lüneburgite. Boracitschacht, Volgershall, Lüneburg, Niedersachsen, Deutschland Taille=35 mm Copyright slugslayer

Pinnoite (rare) ~ Inder B Deposit, Atyrau, Atyrau Oblysy, Kazakhstan Formula: Mg[B2O(OH)6] Strunz: 6.BB.05 Hardness: 3.5