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am mizunaka
Joined: 09 Apr 2010
Posts: 2039
Location: USA
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 Posted: Dec 31, 2022 04:18 Post subject: The Mizunaka Collection - Fluorite |
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| Mineral: | Fluorite |
| Locality: | | Xianghualing Mine, Xianghualing Sn-polymetallic ore field, Linwu, Chenzhou Prefecture, Hunan Province, China |  |
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| Dimensions: | 9.1 x 6.3 cm |
| Description: |
| Green tinted cubes of glass. |
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| Viewed: |
8385 Time(s) |
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am mizunaka
Joined: 09 Apr 2010
Posts: 2039
Location: USA
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| Posted: Jan 02, 2023 03:00 Post subject: The Mizunaka Collection - Quartz |
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| Mineral: | Quartz (variety amethyst) |
| Locality: | | Guanajuato, Municipio Guanajuato, Mexico | |
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| Dimensions: | 9.0 x 7.4 cm |
| Description: |
| Spherical cluster of amethyst on matrix. |
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| Viewed: |
8295 Time(s) |
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am mizunaka
Joined: 09 Apr 2010
Posts: 2039
Location: USA
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| Posted: Jan 05, 2023 04:46 Post subject: The Mizunaka Collection - Rhodochrosite |
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| Mineral: | Rhodochrosite |
| Locality: | | Wolf Mine, Herdorf, Siegerland, Rhineland-Palatinate/Rheinland-Pfalz, Germany | |
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| Dimensions: | 8.1 x 4.4 cm |
| Description: |
| Rhodochrosite on what appears to be manganite. |
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8157 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4106
Location: Germany
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| Posted: Jan 05, 2023 06:02 Post subject: Re: The Mizunaka Collection - Rhodochrosite |
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| am mizunaka wrote: | Rhodochrosite
Weidenstamm Mine, Solms, Lahn-Dill, Giessen Region, Hesse, Germany
Rhodochrosite on what appears to be manganite. |
Hi Mike, a very beautiful specimen! But I have a lot of doubt concerning the locality, actually I am sure it is not from Weidenstamm. As far as I know there were no aesthetic or at least well-crystallized samples of rhodochrosite from this mine. In fact, this is a nearly unknown locality (even in Germany) that never brought any collectible mineral specimen to the market.
I rather think this is from the famous Wolf Mine and that the black material is goethite. Sure no guarantee, but Weidenstamm seems almost impossible to me while Wolf Mine produced very similar specimens. We all know the deep-red ones, but Wolf produced rhodochrosite in nearly all shades of red and pink and in many shapes from scalenohedrons to botryoidal crusts to fan-like forms like that on your specimen. Also, the matrix and the shiny black material in the vug (= most likely goethite) would fit ...
I would say for a 99% not from Weidenstamm and for 95% from Wolf Mine.
Regards
Tobi
[ADDITIONAL INFO]: I showed the photo to two other very knowledgeable collectors of German minerals, but their very different answers won't help: One said this could be from Solms and not from Wolf, the other said exactly the opposite :-/
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am mizunaka
Joined: 09 Apr 2010
Posts: 2039
Location: USA
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| Posted: Jan 05, 2023 15:46 Post subject: Re: The Mizunaka Collection - Rhodochrosite |
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Thanks, Tobi, for your expert insights on the rhodochrosite. The label listed manganite as the matrix, but it didn't look right to me. So I added as appears to be manganite in the file description. The dealer I got this piece from is usually very diligent regarding locality and mineral information. I will let them know that the locality is wrong on this one.
_______________________________________
Fixed. Thanks Tobi and Am
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4106
Location: Germany
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| Posted: Jan 06, 2023 16:10 Post subject: Re: The Mizunaka Collection - Rhodochrosite |
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| am mizunaka wrote: | Thanks, Tobi, for your expert insights on the rhodochrosite. The label listed manganite as the matrix, but it didn't look right to me. So I added as appears to be manganite in the file description. The dealer I got this piece from is usually very diligent regarding locality and mineral information. I will let them know that the locality is wrong on this one.
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Fixed. Thanks Tobi and Am |
As I said, you can't be a 100% sure. I would note on the label "presumably Wolf Mine, given locality was Weidenstamm Mine". Or in German, Grube Wolf / Grube Weidenstamm.
But again, besides the locality problem, it's a gorgeous rhodo specimen, outstandingly beautiful. And no matter what locality it is (actually there are even some more localities in western central Germany that produced similar rhodos), it is for sure from an old German mine, mined at least 60-70 years ago, maybe 80 or more. A great collection piece!
(By the way, "Weidenstamm" means willow trunk)
And Wolf means wolf ;-)
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am mizunaka
Joined: 09 Apr 2010
Posts: 2039
Location: USA
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| Posted: Jan 08, 2023 01:49 Post subject: The Mizunaka Collection - Zoisite |
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| Mineral: | Zoisite (variety tanzanite), Pyrite |
| Locality: | | D-Block Mine, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania | |
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| Dimensions: | 4.8 x 3.5 cm |
| Description: |
| Very blue tanzanite under electronic flash lighting. Tiny pyrites are embedded in the matrix. |
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7869 Time(s) |
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am mizunaka
Joined: 09 Apr 2010
Posts: 2039
Location: USA
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| Posted: Jan 09, 2023 16:36 Post subject: The Mizunaka Collection - Quartz |
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| Mineral: | Quartz (variety smoky quartz) |
| Locality: | | Smoky Mountain Crystal Mine, Ashland, Schuylkill County, Pennsylvania, USA | |
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| Dimensions: | 7.3 x 4.0 cm |
| Description: |
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| Viewed: |
7713 Time(s) |
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Sante Celiberti
Joined: 04 Oct 2019
Posts: 699
Location: Tuscany
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| Posted: Jan 10, 2023 04:25 Post subject: Re: The Mizunaka Collection |
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Simply nice.
Congratulations on your impressive quartz sub-collection.
Greetings from Tuscany.
Sante
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am mizunaka
Joined: 09 Apr 2010
Posts: 2039
Location: USA
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| Posted: Jan 10, 2023 17:59 Post subject: Re: The Mizunaka Collection - Quartz |
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| Sante Celiberti wrote: | Simply nice.
Congratulations on your impressive quartz sub-collection.
Greetings from Tuscany.
Sante |
Thanks Sante!
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am mizunaka
Joined: 09 Apr 2010
Posts: 2039
Location: USA
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| Posted: Jan 11, 2023 17:24 Post subject: The Mizunaka Collection - Rhodochrosite |
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| Mineral: | Rhodochrosite, Laumontite, Pyrite |
| Locality: | | Foote Lithium Co. Mine (Foote Mine), Kings Mountain District, Cleveland County, North Carolina, USA | |
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| Dimensions: | 7.7 x 3.5 cm |
| Description: |
| Spherical rhodochrosite intermixed with laumontite and peppered with tiny pyrite crystals. |
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| Viewed: |
7473 Time(s) |
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am mizunaka
Joined: 09 Apr 2010
Posts: 2039
Location: USA
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| Posted: Jan 14, 2023 06:02 Post subject: The Mizunaka Collection - Topaz |
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| Mineral: | Topaz |
| Locality: | | Ghundao Hill, Katlang, Mardan District, Khyber Pakhtunkhwa, Pakistan | |
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| Dimensions: | 3.5 x 4.0 cm |
| Description: |
| Gemmy pink topaz on a bit of matrix. |
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| Viewed: |
7327 Time(s) |
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Volkmar Stingl
Joined: 23 Sep 2012
Posts: 842
Location: Innsbruck
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| Posted: Jan 14, 2023 10:02 Post subject: Re: The Mizunaka Collection |
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This topaz (and the picture) makes me speechless! Wow!
Volkmar
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am mizunaka
Joined: 09 Apr 2010
Posts: 2039
Location: USA
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| Posted: Jan 14, 2023 17:46 Post subject: Re: The Mizunaka Collection - Topaz |
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| Volkmar Stingl wrote: | This topaz (and the picture) makes me speechless! Wow!
Volkmar |
Thanks Volkmar!
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Romain M
Joined: 02 Nov 2021
Posts: 11
Location: Avignon
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| Posted: Jan 15, 2023 09:47 Post subject: Re: The Mizunaka Collection |
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| Pink topaz are quite unusual, but possible to find... But this quality! danmed! Even in isolated crystals they don't get better than this. A picture more oriented towards the C axis would reveal the depth and saturation of the color. Almost reddish from what I see
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am mizunaka
Joined: 09 Apr 2010
Posts: 2039
Location: USA
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| Posted: Jan 16, 2023 03:26 Post subject: Re: The Mizunaka Collection - Topaz |
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| Romain M wrote: | | Pink topaz are quite unusual, but possible to find... But this quality! danmed! Even in isolated crystals they don't get better than this. A picture more oriented towards the C axis would reveal the depth and saturation of the color. Almost reddish from what I see |
Thanks Romain!
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am mizunaka
Joined: 09 Apr 2010
Posts: 2039
Location: USA
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| Posted: Jan 16, 2023 03:28 Post subject: The Mizunaka Collection - Wulfenite |
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| Mineral: | Wulfenite, Barite |
| Locality: | | Mibladen (Mibladen mining district), Midelt, Midelt Province, Drâa-Tafilalet Region, Morocco | |
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| Dimensions: | 8.8 x 7.3 cm |
| Description: |
| Wulfenites scattered on barite. |
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| Viewed: |
7078 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4106
Location: Germany
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| Posted: Jan 17, 2023 03:11 Post subject: Re: The Mizunaka Collection |
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| That clear Katlang topaz is really a stunner, Mike! Superb!
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am mizunaka
Joined: 09 Apr 2010
Posts: 2039
Location: USA
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| Posted: Jan 18, 2023 05:16 Post subject: Re: The Mizunaka Collection - Topaz |
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| Tobi wrote: | | That clear Katlang topaz is really a stunner, Mike! Superb! |
Thanks Tobi!
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am mizunaka
Joined: 09 Apr 2010
Posts: 2039
Location: USA
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| Posted: Jan 18, 2023 05:22 Post subject: The Mizunaka Collection - Rhodochrosite |
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| Mineral: | Rhodochrosite, Quartz (variety chalcedony) |
| Locality: | | N'Chwaning I Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa | |
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| Dimensions: | 9.0 x 5.8 cm |
| Description: |
| Deep red rhodochrosite crystals with a section of blue chalcedony on the bottom of the specimen. |
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| Viewed: |
6818 Time(s) |
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| Mineral: | Rhodochrosite, Quartz (variety chalcedony) |
| Locality: | | N'Chwaning I Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa | |
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| Dimensions: | 9.0 x 5.8 cm |
| Description: |
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| Viewed: |
6822 Time(s) |
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