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mineralenzo
Joined: 30 Nov 2021
Posts: 35
Location: Sicily
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 Posted: Feb 22, 2022 10:52 Post subject: Fluorite but from where? |
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Good day,
Wandering around the forum I noticed this interesting section that is right for me and will probably do so in the future as well. My label shows the origin of this semi-transparent purple fluorite "Illinois, USA". if someone kindly knew the exact origin would do me a big favor.
Thanks in advance.
| Mineral: | Fluorite |
| Dimensions: | Cm 4x4.5 |
| Description: |
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| Viewed: |
5073 Time(s) |
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| Mineral: | Fluorite |
| Dimensions: | 4 x4.5 cm |
| Description: |
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| Viewed: |
5087 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2264
Location: Oklahoma
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| Posted: Feb 22, 2022 12:44 Post subject: Re: Fluorite but from where? |
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| mineralenzo wrote: | Good day,
My label shows the origin of this semi-transparent purple fluorite "Illinois, USA". if someone kindly knew the exact origin would do me a big favor.
Thanks in advance. |
Enzo,
Your fluorite is a classic example from Hardin County, in southern Illinois. If the drusy white mineral on some of the cube faces is calcite, it is likely from the Denton Mine like the one pictured below.
Michael
| Mineral: | Fluorite |
| Locality: | | Denton Mine, Sub-Rosiclare formation, Goose Creek Mine group, Harris Creek Sub-District, Hardin County, Illinois, USA |  |
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| Dimensions: | 8.0 x 5.5 cm |
| Description: |
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| Viewed: |
5025 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4252
Location: Germany
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| Posted: Feb 23, 2022 04:52 Post subject: Re: Fluorite but from where? |
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| Michael is right, most likely from Denton Mine, but we won't find out for sure. So if you put "Hardin County, Illinois, USA" on the label it should be accurate.
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John Betts
Joined: 07 Jun 2012
Posts: 210
Location: New York City
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| Posted: Feb 23, 2022 11:24 Post subject: Re: Fluorite but from where? |
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I agree with much of above. But the white microcrystals can also be barite or quartz.. A quick test with HCL to check for reaction will verify if it is calcite (fizzes) or quartz/barite (no reaction).
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John Betts |
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silvia
Joined: 10 Oct 2021
Posts: 266
Location: UK
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| Posted: Feb 23, 2022 19:50 Post subject: Re: Fluorite but from where? |
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| Michael Shaw wrote: | | mineralenzo wrote: | Good day,
My label shows the origin of this semi-transparent purple fluorite "Illinois, USA". if someone kindly knew the exact origin would do me a big favor.
Thanks in advance. |
Enzo,
Your fluorite is a classic example from Hardin County, in southern Illinois. If the drusy white mineral on some of the cube faces is calcite, it is likely from the Denton Mine like the one pictured below.
Michael |
Hi Michael:
Nice specimen. It looks a lot like those I have (and will be posting) from Deardorff Mine too. Nice piece - keep up the good work.
Best
Silvia
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