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Bunch of minerals and fossil/s?
  
  Index -> FOR BEGINNERS: What is it? Where is it from?
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Diamond




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PostPosted: Jul 02, 2018 15:36    Post subject: Bunch of minerals and fossil/s?  

Hello here is my second what is it and this time a bunch of items:
So 3 is amethyst I guess 4 is quartz? 5 maybe fluorite? Then 8 looks like iron pyrite crystals in a nice formation.
But that is were I start getting stuck
Is 6 a plant fossil of some kind? 7 looks like crocodile skin and muscle but I guess it's probably two strange rock formations?
Then 1 and 2 are interesting... I'll add some more photos...



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Diamond




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PostPosted: Jul 02, 2018 15:44    Post subject: Re: Bunch of minerals and fossil/s?  

... First and last one are the same crystal... All in UK from auction lot so not sure of history... Thanks!


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Susan Robinson




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PostPosted: Jul 02, 2018 18:03    Post subject: Re: Bunch of minerals and fossil/s?  

My assumptions re the mineral/fossil specimens are:

1 Amethyst, loc.?
2 Tourmaline,specifically, elbaite, in quartz
3 Quartz, variety amethyst, Rio Grande do Sul, Brazil
4 Quartz, variety agate, same loc. as above
5 Fluorite, St. Lawrence mine, Newfoundland, Canada

Susan Robinson

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Diamond




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PostPosted: Jul 03, 2018 06:42    Post subject: Re: Bunch of minerals and fossil/s?  

One of the minerals in this collection just happens to have German written on it.
But loose connection I know and I don't speak German but I think it says fluorite and an area in Germany. You can see this in my other party in the board if you want to of course :) .

But yes just saying and this does looks like glass and that was my first thought. Possibly I will cut it up or finish it to look nice as a sculptural piece as I have some tools that might work on it :D .



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Diamond




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PostPosted: Jul 03, 2018 06:50    Post subject: Re: Bunch of minerals and fossil/s?  

Susan Robinson wrote:
My assumptions re the mineral/fossil specimens are:

1 Amethyst, loc.?
2 Tourmaline,specifically, elbaite, in quartz
3 Quartz, variety amethyst, Rio Grande do Sul, Brazil
4 Quartz, variety agate, same loc. as above
5 Fluorite, St. Lawrence mine, Newfoundland, Canada

Susan Robinson

Thanks! Is 1 amethyst? I thought maybe but it also has black (Smokey?) Colours. Not sure if that's coloured or natural.
2 yes I wondered about that.. Pity the tourmaline parts for snapped off :( . The white part is really shiny I did wonder if it was quartz... I'll add a photo below. 6 and 7 I'm still not sure about... Thx...
There's some German writing on the florite I've noticed... being helpful as well:



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Mathias




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PostPosted: Jul 03, 2018 06:57    Post subject: Re: Bunch of minerals and fossil/s?  

Vloeispaat is the Dutch word for Fluorite.
Not German.
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Diamond




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PostPosted: Jul 03, 2018 07:08    Post subject: Re: Bunch of minerals and fossil/s?  

The other photo...


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Diamond




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PostPosted: Jul 03, 2018 07:11    Post subject: Re: Bunch of minerals and fossil/s?  

Mathias wrote:
Vloeispaat is the Dutch word for Fluorite.
Not German.

Whoops I should of spotted that with the two aa's ! Thanks.

But swartzenfeld is in Germany I guess?
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Diamond




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PostPosted: Jul 03, 2018 07:16    Post subject: Re: Bunch of minerals and fossil/s?  

Sorry, Dutch for fluorite, not German. It was the Swartzenfeld bit that threw me :S ... Not sure of the meaning but I guess that part is the German municipal?
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Mathias




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PostPosted: Jul 03, 2018 07:42    Post subject: Re: Bunch of minerals and fossil/s?  

Schwarzenfel/Oberpfalz is a place/area in Germany.

You can find it on a map. Also type it in Mindat.

regards,

Mathias
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Kevin Schofield




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PostPosted: Jul 03, 2018 08:37    Post subject: Re: Bunch of minerals and fossil/s?  

Diamond wrote:
Hello here is my second what is it and this time a bunch of items:
So 3 is amethyst I guess 4 is quartz? 5 maybe fluorite? Then 8 looks like iron pyrite crystals in a nice formation.
But that is were I start getting stuck
Is 6 a plant fossil of some kind? 7 looks like crocodile skin and muscle but I guess it's probably two strange rock formations?
Then 1 and 2 are interesting... I'll add some more photos...


Number 6 is indeed a plant fossil, Stigmaria sp., which is the root of the Lycopod trees that formed a large part of the forests of the Middle and Upper Carboniferous.

Number 8 is part of a concretion, probably largely originally made of siderite (the brown portions probably still are) some of which has been reduced to pyrite.

Number 7 looks as if it may be an evaporite of some sort...halite or maybe gypsum/anhydrite. That flow banding is quite often seen in those sorts of rocks. Licking it (if you are a real geologist you will :-) ) will show whether it is halite. Or scratching it with a copper coin...

Number 9 could run the gamut from chalcedony (flint) through jadeite to obsidian to furnace slag. Would need a closer-up picture to possibly narrow it down.

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Diamond




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PostPosted: Jul 04, 2018 04:57    Post subject: Re: Bunch of minerals and fossil/s?  

Kevin Schofield wrote:
Diamond wrote:
Hello here is my second what is it and this time a bunch of items:
So 3 is amethyst I guess 4 is quartz? 5 maybe fluorite? Then 8 looks like iron pyrite crystals in a nice formation.
But that is were I start getting stuck
Is 6 a plant fossil of some kind? 7 looks like crocodile skin and muscle but I guess it's probably two strange rock formations?
Then 1 and 2 are interesting... I'll add some more photos...


Number 6 is indeed a plant fossil, Stigmaria sp., which is the root of the Lycopod trees that formed a large part of the forests of the Middle and Upper Carboniferous.

Number 8 is part of a concretion, probably largely originally made of siderite (the brown portions probably still are) some of which has been reduced to pyrite.

Number 7 looks as if it may be an evaporite of some sort...halite or maybe gypsum/anhydrite. That flow banding is quite often seen in those sorts of rocks. Licking it (if you are a real geologist you will :-) ) will show whether it is halite. Or scratching it with a copper coin...

Number 9 could run the gamut from chalcedony (flint) through jadeite to obsidian to furnace slag. Would need a closer-up picture to possibly narrow it down.

Great thanks a lot! OK I've been cleaning... Used detergent for washing clothes as per advice but I have notice what looks like some cracking or maybe it was revealed by the cleaning. I've added mineral oil after taking these pictures and they look better again...I assume I'm doing the right things? No saltyness in number 7 . I've not washed the tree root or pyrite or number 7 except water on one so far. Thanks! And begin photos : (hopefully you can tell which is which as the colours have come up on some better now. The greenish coloured one is bands a bit like Tigers eye that you can only see from certain angles I think you can see it in the first of the new photos)...



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Tobi




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PostPosted: Jul 08, 2018 00:53    Post subject: Re: Bunch of minerals and fossil/s?  

After some wild guesses and misspellings:
The locality of that one fluorite is spelled Schwarzenfeld, it is a small town in Upper Palatinate (Bavaria) and is next to the famous Wölsendorf fluorspar district.
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