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Help Identifying Collection
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Paul




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PostPosted: Apr 06, 2009 11:12    Post subject: Help Identifying Collection  

I've recently aquired a Mineral specimen collection with a few hundred specimens in it, over the last few weeks I've been slowly identifying the pieces in the collection that are no longer catalogued with the help of local rock club members etc, but the collection is large and there are some very unique items in it.

Any help to identify or confirm identification of these specimens would be very much apreciated, an indication of value would also be apreciated.

36&37. The first two images are of the same specimen it is covered in what I believe are calcite crystals on a cuprite matrix, the yellow crystals are unknown to me.

39. Am I correct in saying this is calcite?

43. Orange River Quartz on Matrix

46.Gauderfouclite?

50. Green Kyanite?

53.Chalco Pyerite & ?

54. Rhodocrosite or Rhodonite?

55&56. Calcite With Cuprite Crystals & ?



Specimen056.jpg
 Description:
Calcite With Cuprite Crystals & ?
 Viewed:  27285 Time(s)

Specimen056.jpg



Specimen055.jpg
 Description:
Calcite With Cuprite Crystals & ?
 Viewed:  27313 Time(s)

Specimen055.jpg



Specimen054.jpg
 Description:
Rhodocrosite or Rhodonite?
 Viewed:  27318 Time(s)

Specimen054.jpg



Specimen053.jpg
 Description:
Chalco Pyerite & ?
 Viewed:  27358 Time(s)

Specimen053.jpg



Specimen050.jpg
 Description:
Green Kyanite?
 Viewed:  27314 Time(s)

Specimen050.jpg



Specimen046.jpg
 Description:
Gauderfouclite
 Viewed:  27319 Time(s)

Specimen046.jpg



Specimen043.jpg
 Description:
Possibly Orange river Quartz on Matrix,
 Viewed:  27294 Time(s)

Specimen043.jpg



Specimen039.jpg
 Description:
Calcite?
 Viewed:  27316 Time(s)

Specimen039.jpg



Specimen037.jpg
 Description:
Calcite, Cuprite & ?
 Viewed:  27285 Time(s)

Specimen037.jpg



Specimen036.jpg
 Description:
Calcite, Cuprite & ?
 Viewed:  27273 Time(s)

Specimen036.jpg


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Paul




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PostPosted: Apr 06, 2009 11:26    Post subject: Re: Help Identifying Collection  

Here are a few more.

59. Azurite on Matrix?

61. ?

63. ??

70. Dioptase

78&84. Green Tourmaline on Calcite?

82. Baryte?

86. Some Form of Quartz?

89. Baryte?



Specimen089.jpg
 Description:
Baryte?
 Viewed:  27264 Time(s)

Specimen089.jpg



Specimen086.jpg
 Description:
Some Form of Quartz?
 Viewed:  27284 Time(s)

Specimen086.jpg



Specimen082.jpg
 Description:
Baryte?
 Viewed:  27288 Time(s)

Specimen082.jpg



Specimen084.jpg
 Description:
Green Tourmaline on Calcite?
 Viewed:  27285 Time(s)

Specimen084.jpg



Specimen078.jpg
 Description:
Green Tourmaline on Calcite?
 Viewed:  27287 Time(s)

Specimen078.jpg



Specimen070.jpg
 Description:
Dioptase
 Viewed:  27280 Time(s)

Specimen070.jpg



Specimen063.jpg
 Description:
??
 Viewed:  27304 Time(s)

Specimen063.jpg



Specimen061.jpg
 Description:
?
 Viewed:  27310 Time(s)

Specimen061.jpg



Specimen059.jpg
 Description:
Azurite On Matrix?
 Viewed:  27253 Time(s)

Specimen059.jpg


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Montanpark




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PostPosted: Apr 06, 2009 11:47    Post subject: Re: Help Identifying Collection  

Hi,
i´ll quickly try to get some of them i think i can identify:

59: azurite seems to be correct (maybe moroccan)
61: looks like stichtite (maybe Barberton area, RSA)
70 dioptase (probably Tsumeb)
78 & 84 both tourmaline with quartz
82 looks like Torbernite from Congo to me .. careful, radioactive
43 quartz
36 & 37 .. the yellowish could be mimetite, looks like Tsumeb stuff
50 actinolite
54 cobaltoan calcite or dolomite rather than rhodochroslite ... there is apparently some greenish mineral associated (malachite?), could be from Congo
I have some guesses also for the other specimens but the pictures aren´t clear enough.

in a hurry
cheers
Roger
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Paul




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PostPosted: Apr 06, 2009 11:56    Post subject: Re: Help Identifying Collection  

Thank you for the help, I'll try to take a few clearer pictures of the others.

You are probably correct in your assesment that some of the specimens are from the Tsumeb, there are a large number of known specimens from that region in the collection.
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nurbo




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PostPosted: Apr 06, 2009 14:04    Post subject: Re: Help Identifying Collection  

Hello,
63 looks like it may be Seraphinite it looks like ones Ive seen from the Urals
db
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Paul




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PostPosted: Apr 06, 2009 14:17    Post subject: Re: Help Identifying Collection  

Thanks Nurbo,

Some more info on Specimen 63.

It's Hardness is soft enough to be scratched with a finger nail, Streak test reveals black streaks in a unglazed tile, White inclusions seem to be quartz, with a streak of what appears to be calcite.

I'ts also been identified as possibly star tourmaline, but I'm sceptical of that name.

The rock is heavier than it looks and seems to have minute pyerite inclusions.
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Paul




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PostPosted: Apr 06, 2009 14:19    Post subject: Re: Help Identifying Collection  

Another Angle of Specimen 63


Specimen120.jpg
 Description:
 Viewed:  27273 Time(s)

Specimen120.jpg


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Jordi Fabre
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PostPosted: Apr 06, 2009 14:34    Post subject: Re: Help Identifying Collection  

46.Gauderfouclite? = Gaudefroyite from Kalahari manganese fields, South Africa: https://www.mineralatlas.com/mineral%20photos/G/gaudefroyitecp.htm

Jordi
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Paul




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PostPosted: Apr 06, 2009 14:36    Post subject: Re: Help Identifying Collection  

And a closer image of Specimen 86, I suspect that this is Needle Quartz, I'm not sure what caused the coloring.


Specimen086-2.jpg
 Description:
 Viewed:  27207 Time(s)

Specimen086-2.jpg


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Paul




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PostPosted: Apr 06, 2009 14:45    Post subject: Re: Help Identifying Collection  

Thanks Jordi.

Yes I mistyped Gaudefroyite, it's very heavy for it's size and extremely hard. Under a microscope, it appears to closely match the specimens identified as coming from the wessels mine in Kuruman.
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nurbo




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PostPosted: Apr 06, 2009 18:48    Post subject: Re: Help Identifying Collection  

re no 63, if you can scratch it with a finger nail it may be Seraphinite (or Clinochlore), that has a Mohs hardness of around 2.5 which is finger nail scratchable. Maybe other more knowledgable members can confirm what it is, but one thing is for sure though it isnt tourmaline which is unfingernailscratchable
db
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John S. White
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PostPosted: Apr 07, 2009 04:15    Post subject: Re: Help Identifying Collection  

86 looks like iron oxide impregnated quartz (eisenkiesel) fro Suttrop/Warstein, Sauerland, Germany. It is very distinctive.
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Montanpark




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PostPosted: Apr 07, 2009 05:57    Post subject: Re: Help Identifying Collection  

I don´t think this is a Suttrop quartz. Pauls assumption that it is from the Orange River area is more probable ... particularly as there are obviously a lot of African specimens in the collection.

53 may be a pyrite/chalcopyrite ore with a silicate (have seen such specimens with dark actinolite from Italy for instance)
55 looks like cuprite (1st pictue in the vig) with calcite and malachite/plancheite on matrix. Presumably Congo.
89 looks like a baryte from Rosh Pinah, Namibia, got a few of this pale kind in 2005 also. But this is just a guess as the picture isn´t that clear.

cheers
Roger
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PostPosted: Apr 07, 2009 07:19    Post subject: Re: Help Identifying Collection  

I was referring to 86 which I am quite certain is a Suttrop quartz, I have an almost identical one in my collection and it has been confirmed by several German collectors. The likely Orange River quartz is 43, and I have one of these in my collection as well. Come on, let's not make things any more confused than necessary.
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PostPosted: Apr 07, 2009 07:35    Post subject: Re: Help Identifying Collection  

John,
sry, my fault, i meant the reddish one 43. But i find it hard to tell by only the picture that 86 should come from Suttrop. Quartzes like these with iron oxide inclusions are widespread (and not only in Germany ) ..
but of course it is possible

cheers
Roger (writing from Mainz, GER)-
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Debbie Woolf




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PostPosted: Apr 07, 2009 07:58    Post subject: Re: Help Identifying Collection  

056 & 055

Calcite, Malachite & Cuprite from the Congo

054

Pink Calcite from the Congo

046

I think this is Descloizite from Berg Aukus as they look like spear shaped crystals ??

043

Orange Rver Quartz

084

Tourmaline in Quartz from Namibia probably Neu Schwaben

061

Stichtite

082

Could be Dioptase but Torbenite is probable, need better pictures.
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Paul




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PostPosted: Apr 07, 2009 09:21    Post subject: Re: Help Identifying Collection  

Thank you so much for your help. I'll try to take some higher quality pictures, I am however currently limited since I do not have a macro lense that I can use on my new camera, that should improve in a few days.

Would it help If I added links to the original large (2-10mb) images?

I am still in the process of identifying hundreds of other specimens, and would like to post many of them here for verification, or at least a second opinion if you do not mind.

Debbie the crystals on #46 are indeed spear shaped, difficult to see in the photo i've attached, as soon as I've found a Macro lense i'll take some pictures that clearly show the crystals.
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Jordi Fabre
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PostPosted: Apr 07, 2009 09:33    Post subject: Re: Help Identifying Collection  

It is fine for us to try to help you but please try to discriminate a little bit before to publish all of them here.
"Hundreds of other specimens" maybe could be somewhat overwhelming. Thank you!

Jordi
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Paul




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PostPosted: Apr 07, 2009 09:47    Post subject: Re: Help Identifying Collection  

Not to worry, I'll keep the ones I post here to a minimum, and will only post the ones that I really can not identify without some help

Just on a side note I also have a few members of the mineral association of south africa helping me to identify the minerals, but off-course even they have come accross some specimens that they are uncertain of or that they have never before encountered

It will be mostly these that I will post here, as well as a few that I may feel needs a little more certainty.
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PostPosted: Apr 07, 2009 10:07    Post subject: Re: Help Identifying Collection  

Here is a closer picture of the crystals in Specimen 82, I'm pretty certain that this is not Dioptase, it appears more likely that it could be Torebenite, but I have been wrong before.


Specimen082-2.jpg
 Description:
Torebenite?
 Viewed:  26940 Time(s)

Specimen082-2.jpg


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