Gozaisho Mine, Iwaki City, Fukushima Prefecture, Japan

8 mm long section of short-prismatic crystal of salmon-pink Nambulite with perfect cleavage in Quartz matrix. Associating minerais are brown Mn-bearing Aegirine xls and films of black manganese oxides. Ex-collection of Hiromi Yamasaki. Pavel M. Kartashov collection and photo.

© Pavel M. Kartashov collection & photo

Orange needles of ferri-ghoseite embedded in massive quartz.

© Alfredo Petrov

Granular greenish-black jacobsite-Q (lower left) showing grayish-black sooty film with a somewhat blue iridescence (lower right edge) on matrix containing brown spessartine and pink rhodonite. Very magnetic.

© Van King

Black jacobsite-Q with iridescent coating with brown spessartine matrix. Very magnetic.

© Van King

9mm crude crystal

© Maurice de Graaf

A 0.45 mm elongated white crystal of parabrandtite on a bed of crystalline miguelromeroite. The parabrandtite was confirmed by SXRD (Gerald Giester). The Gozaisho mine is the second locality for this arsenate-analogue of fairfieldite.

dimension area mm. 2 x 2 photo and collection Luigi Chiappino

0.5 cm area of langbanite in rhodonite? S357-26 Excalibur Mineral Company specimen.

© 2008, JGW

dimension area mm. 6 x 6 photo and collection Luigi Chiappino

Manganberzeliite from Gozaisho Mine, Iwaki City.

© Hiroaki TANO

Brown nambulite, with rhodonite, braunite, and quartz. 3 cm sample. S162-04 Excalibur Mineral Company specimen.

© 2008, JGW

Sections of some crystals of brown Aegirine in Quartz matrix. This is manganian (up to 2.5 mas. % Mn2O3) variety of the mineral. Its empirical formula is (Na0.93Ca0.07)1.00(Fe3+0.76Mg0.15Mn3+0.07Ti0.02)2.00[Si2.00O5.97]. Associating minerals are beige fine-granular Calcian Rhodochrosite and black manganese oxide films. FOV width is ~6 mm. ...

© Pavel M. Kartashov collection & photo

Unusually coloured lemon-yellow lusrtous prismatic crystals of manganoan (~3.7% MnO) Magnesio-arfvedsonite in Quartz matrix. Associating minerals are metallic-white Galenа, beige calcian Rhodochrosite and unidentified orange-brown Na-Ca-Fe-silicate. Empirical formula of this Magnesio-arfvedsonite is ...

© Pavel M. Kartashov collection & photo

Pyrophanite from Gozaisho Mine.

© Hiroaki TANO

Native Copper from Gozaisho Mine.

© Hiroaki TANO

5.1 x 4.6 x 2.2 cm. Nambulite is a very rare complex lithium silicate, with easily the finest examples of the species coming from the Kombat Mine - but only once. This is much older matieral: This rich combination specimen is from an extinct manganese mine in Japan. A prominent burnt-orange nambulite veinlet courses across the manganese ore matrix ...

© Rob Lavinsky & irocks.com

© D. Nishio-Hamane

The same under slightly another direction of lighting. Sections of some crystals of brown Aegirine in Quartz matrix. This is manganian (up to 2.5 mas. % Mn2O3) variety of the mineral. Its empirical formula is (Na0.93Ca0.07)1.00(Fe3+0.76Mg0.15Mn3+0.07Ti0.02)2.00[Si2.00O5.97]. Associating minerals are beige fine-granular Calcian Rhodochrosite and ...

© Pavel M. Kartashov collection & photo

The same under slightly another direction of lighting. Sections of some crystals of brown Aegirine in Quartz matrix. This is manganian (up to 2.5 mas. % Mn2O3) variety of the mineral. Its empirical formula is (Na0.93Ca0.07)1.00(Fe3+0.76Mg0.15Mn3+0.07Ti0.02)2.00[Si2.00O5.97]. Associating minerals are beige fine-granular Calcian Rhodochrosite and ...

© Pavel M. Kartashov collection & photo

5.1 x 4.6 x 2.2 cm. Nambulite is a very rare complex lithium silicate, with easily the finest examples of the species coming from the Kombat Mine - but only once. This is much older matieral: This rich combination specimen is from an extinct manganese mine in Japan. A prominent burnt-orange nambulite veinlet courses across the manganese ore matrix ...

© Rob Lavinsky & irocks.com

Native Copper buried in Rhodnite.

© Hiroaki TANO

© D. Nishio-Hamane

Black, granular langbanite in matrix. Rolf Luetcke specimen and photo.

Black, micro crystals of langbanite in matrix. Rolf Luetcke specimen and photo.

Lustrous greyish-black, metallic 'iwakiite' in black Mn-ore matrix. Older material, purchased in 1982.

© Andrew Hodgson

Grey metallic jacobsite, variety jacobsite-Q (FRL, first recorded locality of unapproved mineral/variety), formerly named iwakiite. Some small crystals can be seen in the center but most is microcrystalline-massive. Euromex EduBlue 5 MP CMOS Camera; ImageFocus Plus, Helicon Focus. Peter Lof photo and collection.

© Peter Lof

Orange nambulite (XEDS analyzed) from the Gozaisho Mine, Fukushima Prefecture, Japan. An XEDS analysis showed that this is not natronambulite. Photographed with a Nikon Z7 camera using a Nikkor 105mm macro lens, 32mm of extension tubes, and a manual focusing rail. Composite of 25 images stacked with Helicon Focus. Chris Emproto photo. Keywords: ...

© Chris Emproto

Orange yellow Nambulite. Photo with Canon Eos 600 D + Bellows + Rodenstock Rodagon 50 mm 1:4,0 reversed. Photo and collection Giovanni Scapin.

In Rhodonite, cleavage crystal of Långbanite (analyzed).

Adits in Gozaisho Mine, Fukushima Pref.

© Hiroaki TANO

Lower level adits in Gozaisho Mine, Fukushima Pref. You can see unnaturally bended cedar tree in right of the photo. It's caused by snow lied on steep slope in winter.

© Hiroaki TANO

Site of the powder magazine in Gozaisho Mine. Field observation in May., 2016.

Lower adit of Photo ID:476859. Description of red plate is "KEEP OUT". Always, danger is there...

© Hiroaki TANO

Adits in Gozaisho Mine. Field observation in May., 2016.

© Hiroaki TANO