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Ashio mine, Ashio, Tochigi Prefecture, Kanto region, Honshu Island, Japan This historic copper mine was first worked in 1609. Good specimens from here are not often found on today's mineral market. The example shown here is an excellent well crystallized apatite, with colorless transparent crystals to 0.9 cm in size aesthetically set upon a 5.3 x 4.7 x 2.2 cm matrix. Crystallized on all sides. With a 10x loupe I can ... |
| © Diana & Dan Weinrich Minerals | Photo ID: 233570 View Count: 28 |
Apatite-(CaF) : Ca5[F|(PO4)3] | |
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Ashio mine, Ashio, Tochigi Prefecture, Kanto region, Honshu Island, Japan Apatite crystals. Specimen from the collection of Carl Fair 1974. Scale at bottom of image is an inch with a rule at one cm. |
| Photo ID: 217399 View Count: 25 | |
Arsenopyrite : FeAsS - (Fe0.90Co0.10)AsS, Fluorite : CaF2 | |
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Ashio mine, Ashio, Tochigi Prefecture, Kanto region, Honshu Island, Japan 5.4 x 4.3 x 2.3 cm. An old-time and showy Japanese combination specimen of sharp, lustrous, steel-gray arsenopyrite crystals covering matrix and attractively resting above a highly complimentary and contrasting band of intergrown, frosted, translucent, sea-green fluorite crystals. A fine, old specimen from a historic copper mine. Ex. John Ydren ... |
| © Rob Lavinsky | Photo ID: 150441 View Count: 108 |
Bismuth : Bi | |
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Ashio mine, Ashio, Tochigi Prefecture, Kanto region, Honshu Island, Japan 7.2 x 4.6 x 3.3 cm. Incredible locality piece AND a good native crystallized bismuth. This specimen features 1 cm crystals of sharp, lustrous bismuth in ore, from a long-defunct locality. This is an old specimen from the John Ydren collection by way of the Burton Jirgl Collection (noted for his Japanese suite assembled in the 1950s). |
| © Rob Lavinsky | Photo ID: 169968 View Count: 95 |
Chalcopyrite : CuFeS2 | |
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Ashio mine, Ashio, Tochigi Prefecture, Kanto region, Honshu Island, Japan 4 cm crystal. S358-16 Excalibur Mineral specimen. |
| © 2008, JGW | Photo ID: 155184 View Count: 84 |
Ikunolite : Bi4(S,Se)3 | |
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Ashio mine, Ashio, Tochigi Prefecture, Kanto region, Honshu Island, Japan A 5 mm specimen of Ikunolite from the Asio mine, Tochigi, Japan, Specimen and photo: Knut Eldjarn. |
| © Knut Eldjarn | Photo ID: 58282 View Count: 565 |
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Fukaiwa, Kanuma, Tochigi Prefecture, Kanto Region, Honshu Island, Japan Powdery volcanic pumice, partially altering to imogolite. S378-18 0.6 cm specimen, courtesy of Excalibur Mineral Company. |
| © 2008, JGW | Photo ID: 143668 View Count: 294 |
Marcasite : FeS2 | |
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Ashio mine, Ashio, Tochigi Prefecture, Kanto region, Honshu Island, Japan 4.5 x 3.9 x 3.1 cm. A very fine, complete-all-around miniature from a classic and historic locale. Ex. Rice Northwest Museum Collection. |
| © Rob Lavinsky | Photo ID: 177948 View Count: 55 |
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Kyurasawa mine (Kyuurasawa; Kyurazawa), Ashio, Tochigi Prefecture, Kanto Region, Honshu Island, Japan Manganpyrosmalite comprising most of the pink part of this specimen, with brownish yellow spessartine and minor brown tephroite or fayalite. S401-002 1 cm field of view. Excalibur Mineral Company specimen. |
| © 2008, JGW | Photo ID: 157971 View Count: 117 |
Pyrosmalite-(Mn) : (Mn,Fe)8Si6O15(OH,Cl)10 | |
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Takanosu mine, Kanuma, Tochigi Prefecture, Kanto Region, Honshu Island, Japan Free-standing pyrosmalite-(Mn) (manganpyrosmalite) crystals up to 3mm. Some of the pyrosmalite-(Mn) crystals from this mine can be much larger. |
| © alfredo petrov | Photo ID: 250667 View Count: 21 |
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