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Forrestblyth
Joined: 21 Jun 2022
Posts: 119
Location: Ne244ly
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 Posted: Apr 05, 2025 08:18 Post subject: An interesting 10 inch multi mineral Blackdene plate |
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Had an interesting morning looking over a decent sized plate from The Blackdene Mine in Ireshopburn Weardale
it is predominantly Quartz and fluorite
But I can see a nice galena crystal with an off-white scattering of an unknown crystal next to it. I have also spotted a few blades of baryte.
I would like to know what the off-white cream mineral is
| Mineral: | Quartz Fluorite and Galena |
| Locality: | | Blackdene Mine, Ireshopeburn, Weardale, North Pennines Orefield, County Durham, England / United Kingdom |  |
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| Dimensions: | 25cms |
| Description: |
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1129 Time(s) |
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| Mineral: | Quartz Fluorite and Galena |
| Locality: | | Blackdene Mine, Ireshopeburn, Weardale, North Pennines Orefield, County Durham, England / United Kingdom | |
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| Dimensions: | 25cms |
| Description: |
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| Viewed: |
1133 Time(s) |
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| Mineral: | Quartz Fluorite and Galena |
| Locality: | | Blackdene Mine, Ireshopeburn, Weardale, North Pennines Orefield, County Durham, England / United Kingdom | |
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| Dimensions: | 25cms |
| Description: |
| Don't know what the isolated off-white cream-colored mineral is |
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| Viewed: |
1130 Time(s) |
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| Mineral: | Quartz Fluorite and Galena |
| Locality: | | Blackdene Mine, Ireshopeburn, Weardale, North Pennines Orefield, County Durham, England / United Kingdom | |
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| Dimensions: | 25cms |
| Description: |
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| Viewed: |
1126 Time(s) |
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James Catmur
Site Admin
Joined: 14 Sep 2006
Posts: 1463
Location: Cambridge
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| Posted: Apr 05, 2025 09:00 Post subject: Re: An interesting 10 inch multi mineral Blackdene plate |
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| It could be calcite - see if it produces bubbles when you put vinegar on it
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Bob Carnein
Joined: 22 Aug 2013
Posts: 354
Location: Florissant, CO
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| Posted: Apr 05, 2025 09:52 Post subject: Re: An interesting 10 inch multi mineral Blackdene plate |
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| James is right. The crystal habit appears to be that of calcite.
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Jesse Fisher
Joined: 18 Mar 2009
Posts: 639
Location: San Francisco
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| Posted: Apr 05, 2025 10:09 Post subject: Re: An interesting 10 inch multi mineral Blackdene plate |
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| If the specimen is actually from Blackdene, I would be very surprised if there is any baryte present. The combination of baryte and fluorite is only seen in a few mines along the periphery of the fluorite zone in the North Pennines Orefield, and I have never seen any from the mines in Weardale.
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Forrestblyth
Joined: 21 Jun 2022
Posts: 119
Location: Ne244ly
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| Posted: Apr 05, 2025 13:20 Post subject: Re: An interesting 10 inch multi mineral Blackdene plate |
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| Jesse Fisher wrote: | | If the specimen is actually from Blackdene, I would be very surprised if there is any baryte present. The combination of baryte and fluorite is only seen in a few mines along the periphery of the fluorite zone in the North Pennines Orefield, and I have never seen any from the mines in Weardale. |
100% certain about provenance of location.
Identification of blade like material as Baryte is suspect and probably incorrect.
The off white crystal has some reaction to acid so concur as most likely Calcite
Under UV only the Fluorite reacts.
Many thanks for all the Help
Regards Forrest
| Mineral: | Quartz, Fluorite and Galena |
| Locality: | | Blackdene Mine, Ireshopeburn, Weardale, North Pennines Orefield, County Durham, England / United Kingdom | |
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| Dimensions: | 25cms |
| Description: |
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| Viewed: |
963 Time(s) |
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