We use cookies to show content based on your preferences. If you continue to browse you accept their use and installation. More information. >

FMF - Friends of Minerals Forum, discussion and message board
The place to share your mineralogical experiences

FMF English Forum is moderated by John S. White and Peter Megaw
 

Spanish message board






Newest topics and users posts
06 Dec-16:11:47 Fun with mineralogy (Cascaillou)
06 Dec-05:11:52 Re: collection of firmo espinar (Firmo Espinar)
05 Dec-05:37:49 Re: new generation for picture - ploum (Ploum)
04 Dec-20:28:22 Re: asbestos name change (Woody Thompson)
04 Dec-18:09:03 Re: collection of sante celiberti - a mineralogical trip through italy (Sante Celiberti)
04 Dec-16:10:55 Re: new generation for picture - ploum (Ploum)
04 Dec-14:27:18 Re: "jaguar" agates from wy (Bob Harman)
04 Dec-13:31:57 Re: "jaguar" agates from wy (Jrh4)
04 Dec-11:39:46 Re: a mineralogical trip through the regions of the uk - england / county durham (Jesse Fisher)
04 Dec-11:00:27 Re: munich show (mineralientage) 2019 (John S. White)
04 Dec-09:22:45 Re: munich show (mineralientage) 2019 (Tony L. Potucek)
04 Dec-04:56:00 Re: asbestos town name change (James Catmur)
04 Dec-03:20:27 Re: a mineralogical trip through germany / sachsen - saxony (Tobi)
04 Dec-03:19:33 Re: "jaguar" agates from wy (Jordi Fabre)
03 Dec-19:52:58 Re:"jaguar" agates from wy (Jrh4)
03 Dec-19:39:11 Re: a mineralogical trip through germany / sachsen - saxony (Jesse Fisher)
03 Dec-17:34:34 Re: asbestos name change (Pete Richards)
03 Dec-17:02:55 Re: asbestos name change (Jordi Fabre)
03 Dec-16:46:30 Re: some thoughts about the recents munich and expominer shows (Tobi)
03 Dec-16:41:14 Re: collection of sante celiberti - a mineralogical trip through italy (Sante Celiberti)
03 Dec-15:10:12 Re: asbestos name change (Rweaver)
03 Dec-14:34:15 Re: asbestos name change (Jordi Fabre)
03 Dec-14:32:50 Re: asbestos name change (Peter Lemkin)
03 Dec-14:31:15 Re: asbestos name change (Joseph Doliveira)
03 Dec-14:25:59 Re: collection of fiebre verde (Philippe Durand)

For lists of newest topics and postings click here


RSS RSS

View unanswered posts

Why and how to register

Index Index
 FAQFAQ RegisterRegister  Log inLog in
 {Forgotten your password?}Forgotten your password?  

Like
60623


The time now is Dec 07, 2019 02:38

Search for a textSearch for a text   

A general guide for using the Forum with some rules and tips
The Mizunaka Collection
  Goto page Previous  1, 2, 3, 4 ... 72, 73, 74  Next
  Index -> Collection photos and Collector's page
Like
4710


View previous topic :: View next topic  
Author Message

Jim Robison




Joined: 17 Nov 2010
Posts: 55

View user's profile

Send private message

PostPosted: May 03, 2014 19:54    Post subject: Re: The Mizunaka Collection  

AM

Your latest Tsumeb smithsonite is beyond lovely. Very nice indeed. The yellow bleb inclusions are commonly attributed to either cadmium or greenockite (cadmium sulfide). Unfortunately, there is not any analysis I am aware of to confirm this, but it is the logical mineral. I have several in my Tsumeb smithsonite suite, and they all came with that attribution.

It would be very interesting to see a magnified view of the edge of the specimen. Tsumeb dolomite casts (epimorphs) are a particular passion of mine, and whenever I see a Tsumeb cast I am always suspicious. It does appear, in a couple of places, that there is a thin brown layer separating the quartz and the smithsonite. If present, it would be a very good indicator for dolomite stained by iron oxides. If it is indeed a cast, then this would be the first piece I have seen with quartz in association. A very rare critter indeed.
Back to top
Reply to topic Reply with quote
Like
   

am mizunaka




Joined: 09 Apr 2010
Posts: 1324
Location: California


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 03, 2014 21:50    Post subject: Re: The Mizunaka Collection  

Jim, I have taken a photo of the edge of the piece as well as what appears to be a seam running through part of the shell.


SmithsoniteEdge.jpg
 Description:
Smithsonite, Quartz
Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia
Specimen Edge
 Viewed:  19268 Time(s)

SmithsoniteEdge.jpg



SmithsoniteSeam.jpg
 Description:
Smithsonite, Quartz
Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia
Seam
 Viewed:  19307 Time(s)

SmithsoniteSeam.jpg


Back to top
Reply to topic Reply with quote
Like
1
   

Jim Robison




Joined: 17 Nov 2010
Posts: 55

View user's profile

Send private message

PostPosted: May 03, 2014 22:47    Post subject: Re: The Mizunaka Collection  

Mike Your excellent new pics have a puzzle or two in them. On the second shot, with the layered material it seems most likely you are looking at dolomite. The first pic has an anomaly in that there is an obvious area where there is no intermediate material between the two sides. Very unusual. So let's back up a bit.

I went back to much expanded views of the first two pics, and am wondering about the quartz ID. Smithsonite can display a habit much like your piece shows. Have you checked hardness and/or dilute HCL reaction?. I observed a few areas where it appears there are clear rhombs, consistent with smithsonite, and with a wavy surface texture similar to some smithsonite. I think calcite is unlikely. There do not appear to be many, if any, typical quartz terminations.

Looking back at the first two pics in an expanded magnified view, there is clear evidence on the bottom of one view of a typical dolomite cast layer. There are some unusual things happening here. Fascinating specimen.
Back to top
Reply to topic Reply with quote
Like
   

am mizunaka




Joined: 09 Apr 2010
Posts: 1324
Location: California


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 04, 2014 02:24    Post subject: Re: The Mizunaka Collection  

Jim, I have not checked the hardness or tried to do an dilute HCL reaction test.
Back to top
Reply to topic Reply with quote
Like
   

Jim Robison




Joined: 17 Nov 2010
Posts: 55

View user's profile

Send private message

PostPosted: May 04, 2014 21:48    Post subject: Re: The Mizunaka Collection  

Mike

A simple scratch test with a steel needle in an out of the way place on the clear crystals would give a good indicator on the quartz versus smithsonite question.

I've been reminded by a good Tsumeb oriented friend that I was probably premature in calling it a dolomite cast. Indeed, a test of the brown layer, and another of the white grainy material would answer the question and if you are so inclined, that would be the way to go. Conversely, it may not be worth spending the money to get an answer.

Your excellent high resolution pictures, with the ability to zoom on a small area, are really fantastic. I always look forward to seeing your work, and now that I've belatedly realized what I can look at in detail they add wonderfully to your work.

The ID of the rock is interesting, and I would love to have the piece in hand for close examination, but the pictures get me really close. Thanks, Jim
Back to top
Reply to topic Reply with quote
Like
   

am mizunaka




Joined: 09 Apr 2010
Posts: 1324
Location: California


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 04, 2014 23:50    Post subject: Re: The Mizunaka Collection  

Jim, I took a needle to a small clear crystal on the backside and it did not scratch it.
Back to top
Reply to topic Reply with quote
Like
   

am mizunaka




Joined: 09 Apr 2010
Posts: 1324
Location: California


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 07, 2014 04:16    Post subject: Re: The Mizunaka Collection  

The quartz with rutile is from a small find found in 2001/2002 near the Rist Mine in Hiddenite, North Carolina. The smoky quartz is very glassy and has distinct zoning that is not clearly visible in the photograph. The red arrow marks a movable bubble.


QtzGoldRutile4.jpg
 Description:
Quartz, Rutile
Hiddenite, Alexander Co., North Carolina, USA
3.9 x 2.8 cm
 Viewed:  18939 Time(s)

QtzGoldRutile4.jpg



QtzGoldRutileBk2.jpg
 Description:
Quartz, Rutile
Hiddenite, Alexander Co., North Carolina, USA
Back Side
 Viewed:  18722 Time(s)

QtzGoldRutileBk2.jpg



SmkRistEnhdro1.jpg
 Description:
Quartz (var Smoky Quartz)
Rist Mine, Hiddenite, Alexander Co., North Carolina, USA
6.5 x 3.8 cm
 Viewed:  18815 Time(s)

SmkRistEnhdro1.jpg


Back to top
Reply to topic Reply with quote
Like
   

am mizunaka




Joined: 09 Apr 2010
Posts: 1324
Location: California


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 08, 2014 19:11    Post subject: Re: The Mizunaka Collection  

..


BlueBarite2.jpg
 Description:
Baryte
Jebel Ouichane, Beni Bou Ifrour, Nador, Nador Province, Oriental Region, Morocco
7.8 x 7.0 cm
 Viewed:  18802 Time(s)

BlueBarite2.jpg



BlueBarite1.jpg
 Description:
Baryte
Jebel Ouichane, Beni Bou Ifrour, Nador, Nador Province, Oriental Region, Morocco
7.8 x 7.0 cm
 Viewed:  18820 Time(s)

BlueBarite1.jpg



KongsbergSilver.jpg
 Description:
Silver
Kongsberg, Buskerud, Norway
3.5 x 4.5 cm
 Viewed:  18760 Time(s)

KongsbergSilver.jpg


Back to top
Reply to topic Reply with quote
Like
   

Mike Wood




Joined: 16 Dec 2010
Posts: 456
Location: Northern England


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 09, 2014 14:30    Post subject: Re: The Mizunaka Collection  

Lovely quartzes from Rist Mine, Mike. The blue Baryte specimen from Morrocco looks mouthwateringly good, and excellent contrast with the matrix!

Thanks, Mike

_________________
Rock basher
Back to top
Reply to topic Reply with quote
Like
   

am mizunaka




Joined: 09 Apr 2010
Posts: 1324
Location: California


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 10, 2014 01:39    Post subject: Re: The Mizunaka Collection  

Thanks Mike. I really like the Baryte specimen too and I think the quartz pieces are a little different than the usual for that locality.


QtzBarite.jpg
 Description:
Baryte, Quartz
Jinkouhe District, Leshan Prefecture, Sichuan Province, China
9.7 x 8.3 cm
 Viewed:  18661 Time(s)

QtzBarite.jpg


Back to top
Reply to topic Reply with quote
Like
   

Tobi




Joined: 07 Apr 2009
Posts: 3149
Location: Good Old Germany


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 10, 2014 02:30    Post subject: Re: The Mizunaka Collection  

am mizunaka wrote:
Baryte, Quartz
Jinkouhe District, Leshan Prefecture, Sichuan Province, China
9.7 x 8.3 cm

Are there two generations of Baryte? Looks like some are honey-coloured and some white with some coating ...

Cheers!
Tobi
Back to top
Reply to topic Reply with quote
Like
   

am mizunaka




Joined: 09 Apr 2010
Posts: 1324
Location: California


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 10, 2014 17:38    Post subject: Re: The Mizunaka Collection  

Tobi, I think that the white coating is a fine layer of quartz.
Back to top
Reply to topic Reply with quote
Like
   

Tobi




Joined: 07 Apr 2009
Posts: 3149
Location: Good Old Germany


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 11, 2014 01:22    Post subject: Re: The Mizunaka Collection  

am mizunaka wrote:
Tobi, I think that the white coating is a fine layer of quartz.

OK, and the yellow Barytes? Uncoated several crystals or just uncoated parts of the same Baryte crystals? Just wanted to know if there are two generations or not ;)

Tobi
Back to top
Reply to topic Reply with quote
Like
   

Roger Warin




Joined: 23 Jan 2013
Posts: 936


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 11, 2014 16:23    Post subject: Re: The Mizunaka Collection  

Delicate pictures for these Barytes.
Bravo.
Roger.
Back to top
Reply to topic Reply with quote
Like
   

am mizunaka




Joined: 09 Apr 2010
Posts: 1324
Location: California


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 11, 2014 23:16    Post subject: Re: The Mizunaka Collection  

Tobi - I would say that the Barytes are a single generation with the possible exception being the largest visible Baryte crystal.

Thanks Roger. This was one of the few pieces I have run across with no damage.



QtzFluoriteSp1.jpg
 Description:
Fluorite, Quartz
Yaogangxian Mine, Yizhang Co., Chenzhou Prefecture, Hunan Province, China
5.0 x 2.9 cm
 Viewed:  18241 Time(s)

QtzFluoriteSp1.jpg



QtzFluoriteSp.jpg
 Description:
Fluorite, Quartz
Yaogangxian Mine, Yizhang Co., Chenzhou Prefecture, Hunan Province, China
5.0 x 2.9 cm
 Viewed:  18229 Time(s)

QtzFluoriteSp.jpg



Acanthite.jpg
 Description:
Acanthite
Proano Mine, Mun. de Fresnillo, Zacatecas, Mexico
4.4 x 2.2 cm
 Viewed:  18401 Time(s)

Acanthite.jpg



AcanthiteBk1.jpg
 Description:
Acanthite
Proano Mine, Mun. de Fresnillo, Zacatecas, Mexico
Back Side
 Viewed:  18279 Time(s)

AcanthiteBk1.jpg



AcanFloater.jpg
 Description:
Acanthite
Fresnillo Mine, Mun. de Fresnillo, Zacatecas, Mexico
2.7 x 1.9 cm
 Viewed:  18413 Time(s)

AcanFloater.jpg



AcanFloaterBk.jpg
 Description:
Acanthite
Fresnillo Mine, Mun. de Fresnillo, Zacatecas, Mexico
Back Side
 Viewed:  18451 Time(s)

AcanFloaterBk.jpg



AcanPseudo1.jpg
 Description:
Acanthite
Guanajuato, Mun. de Guanajuato, Guanajuato, Mexico
4.1 x 1.8 cm
 Viewed:  18423 Time(s)

AcanPseudo1.jpg


Back to top
Reply to topic Reply with quote
Like
   

am mizunaka




Joined: 09 Apr 2010
Posts: 1324
Location: California


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 12, 2014 23:25    Post subject: Re: The Mizunaka Collection  




DTQtzEpidoteLg1.jpg
 Description:
Epidote, Quartz
Pisco Province, Ica Department, Peru
6.5 x 1.1 cm
 Viewed:  18224 Time(s)

DTQtzEpidoteLg1.jpg



QtzSA1.jpg
 Description:
Quartz
Santander Department, Colombia
11.4 x 5.7 cm
 Viewed:  18236 Time(s)

QtzSA1.jpg


Back to top
Reply to topic Reply with quote
Like
   

am mizunaka




Joined: 09 Apr 2010
Posts: 1324
Location: California


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 14, 2014 02:04    Post subject: Re: The Mizunaka Collection  




FluoriteQtzZone.jpg
 Description:
Fluorite, Quartz
Dayu Co., Ganzhou Prefecture, Jiangxi Province, China
5.4 x 3.9 x 3.2 cm
 Viewed:  18138 Time(s)

FluoriteQtzZone.jpg



FluoriteQtzZone1.jpg
 Description:
Fluorite, Quartz
Dayu Co., Ganzhou Prefecture, Jiangxi Province, China
5.4 x 3.9 x 3.2 cm
 Viewed:  18330 Time(s)

FluoriteQtzZone1.jpg


Back to top
Reply to topic Reply with quote
Like
1
   

am mizunaka




Joined: 09 Apr 2010
Posts: 1324
Location: California


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 14, 2014 22:44    Post subject: Re: The Mizunaka Collection  

..


QtzFuchite.jpg
 Description:
Quartz, Muscovite (var fuchsite)
Cerro Quesgar, Ancash Department, Peru
12.6 x 11.3 cm
 Viewed:  18112 Time(s)

QtzFuchite.jpg


Back to top
Reply to topic Reply with quote
Like
   

am mizunaka




Joined: 09 Apr 2010
Posts: 1324
Location: California


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 16, 2014 01:36    Post subject: Re: The Mizunaka Collection  




FluoriteArseno.jpg
 Description:
Fluorite, Arsenopyrite
Yaogangxian Mine, Yizhang Co., Chenzhou Prefecture, Hunan Province, China
4.5 x 4.0 cm
 Viewed:  17976 Time(s)

FluoriteArseno.jpg



FluoriteQtzCalcLg.jpg
 Description:
Fluorite, Calcite, Quartz
Jingbian Cu-Au deposit, Zongyang Co., Anqing Prefecture, Anhui Province, China
6.5 x 6.0 cm
 Viewed:  18032 Time(s)

FluoriteQtzCalcLg.jpg


Back to top
Reply to topic Reply with quote
Like
   

Philip Mostmans




Joined: 08 Nov 2011
Posts: 40
Location: Mechelen


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: May 16, 2014 04:05    Post subject: Re: The Mizunaka Collection  

In the third to last post you mention Dayu. Co. for both Fluorites. How sure are you about the provenance? I got a very similar piece at a show last year, labeled as Yaogangxian...
Back to top
Reply to topic Reply with quote
Like
   
Display posts from previous:   
   Index -> Collection photos and Collector's page   All times are GMT - 5 Hours
Page 3 of 74
  Goto page Previous  1, 2, 3, 4 ... 72, 73, 74  Next  

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


All pictures, text, design © Forum FMF 2006-2019


Powered by FMF