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Mineral ID
Posted by: Mineral Master
Date: March 21, 2017 09:38PM
Hey all I found this mineral on one side its fluorite(sorry don't have that side in the pic) But the other side has this mineral


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Re: Mineral ID
Posted by: Mineral Master
Date: March 21, 2017 09:45PM
Sorry what is it?

Re: Mineral ID
Posted by: Johnho
Date: March 22, 2017 06:23PM
If you're talking about the yellow material under the purple fluorite it's fluorite also. If you talking about that crusty stuff put some diluted HCL (10% HCL) on it and see if it fizzes. If it does it's probable a limestone. If it doesn't I have no idea with getting my hands on it.

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Re: Mineral ID
Posted by: Champ Ferguson
Date: March 22, 2017 09:10PM
calcite is often found with fluorite.



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Re: Mineral ID
Posted by: Mineral Master
Date: March 23, 2017 08:23AM
Does Calcite come in this color?

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Re: Mineral ID
Posted by: Mineral Master
Date: March 23, 2017 08:25AM
I also found so Mica crusting the yellow mineral if that helps

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Re: Mineral ID
Posted by: Champ Ferguson
Date: March 23, 2017 10:30AM
Quote
Mineral Master
Does Calcite come in this color?

yes.
where did you find the sample? that could say a lot.

eta: another place you may want to ask if you aren't satisfied with what we can speculate, is the McRocks board. http://mcrocks.websitetoolbox.com/categories



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Edited 1 time(s). Last edit at 03/23/2017 10:32AM by Champ Ferguson.

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Re: Mineral ID
Posted by: Mineral Master
Date: March 23, 2017 10:34AM
Well I found in a field, near where some construction had recently taken place. Sooooo is it calcite, or fluorite? And should i try and remove the limestone on it?

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Edited 1 time(s). Last edit at 03/23/2017 10:38AM by Mineral Master.

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Re: Mineral ID
Posted by: Champ Ferguson
Date: March 23, 2017 01:45PM
No , I mean where like "eastern Tennessee or central Missouri". That'll tell us about what is normally found in the area. Certain rocks tend be found together.

To tell calcite v fluorite, you can look at the cleavage or the hardness. http://geology.com/minerals/mohs-hardness-scale.shtml

Your call for what you'd like to have, but I wouldn't remove the limestone. Its a nice looking specimen as it is imo.



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Re: Mineral ID
Posted by: Mineral Master
Date: March 23, 2017 01:49PM
Found it in South eastern Wisconsin in the Waukesha area.

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Re: Mineral ID
Posted by: Champ Ferguson
Date: March 23, 2017 02:31PM
This link do you any good?
https://wgnhs.uwex.edu/minerals/fluorite/
Do any hardness tests yet?



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Edited 1 time(s). Last edit at 03/23/2017 02:32PM by Champ Ferguson.

Re: Mineral ID
Posted by: Johnho
Date: March 23, 2017 05:00PM
Drop some HCL on it then. If it fizzes it's calcite but I've seen too many samples like this to think it's calcite. Could be but doubt it. Also calcite is slightly softer than fluorite, if you have a piece of calcite see if the purple fluorite scratches the yellow stuff. Be careful you don't mistake the residue left by the fluorite as a scratch on the calcite. Make sure there is really a scratch.

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Re: Mineral ID
Posted by: Mineral Master
Date: March 23, 2017 05:10PM
Ok I'll try

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Re: Mineral ID
Posted by: Mineral Master
Date: March 23, 2017 05:15PM
OK I tried scratching the yellow stuff with a different piece of fluorite that I had, it didn't leave a scratch on either mineral. Does this mean its fluorite as well?

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Re: Mineral ID
Posted by: Champ Ferguson
Date: March 24, 2017 09:55AM
Most likey, yes.

But please believe that IDing from just a picture on the internet isn't an exact science. If you have a local college with a geology department or even just a professor, take it there and ask them to be certain.



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