Pete Richards
Site Admin
Joined: 29 Dec 2008
Posts: 828
Location: Northeast Ohio
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 Posted: Nov 02, 2023 13:28 Post subject: Locality for sphalerite and white mineral |
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Here is an old specimen, probably 19th century, of sphalerite and a white mineral. There are two specimens in the collection with catalog number 2260, reportedly from Joplin, Missouri. However, the two specimens look very different, so I somewhat distrust the locality attribution.
This specimen features dark brown sphalerite with incomplete balls of a white, elongated mineral that I am assuming is barite. The white mineral began growing after some sphalerite was already deposited on the brownish matrix (weathered limestone?)
Can anyone offer a definite attribution of a locality? Can anyone verify the identity of the white ball-forming mineral?
| Mineral: | Sphalerite and ? |
| Dimensions: | 7 x 8 cm |
| Description: |
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| Viewed: |
3678 Time(s) |
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| Description: |
| Back side of specimen - matrix |
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| Viewed: |
3666 Time(s) |
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| Description: |
| Side view. Matrix toward bottom. Shows a band of sphalerite before nucleation and growth of white mineral. |
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| Viewed: |
3642 Time(s) |
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| Description: |
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| Viewed: |
3633 Time(s) |
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Collecting and studying crystals with interesting habits, twinning, and epitaxy |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4893
Location: Barcelona
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| Posted: Nov 02, 2023 16:29 Post subject: Re: Locality for sphalerite and white mineral |
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Dan, one of the foremost experts in Missouri minerals, assist us:
| Dan Weinrich wrote: |
Sure looks like barite/sphalerite from somewhere here in the middle U.S. It could be from Missouri, though normally one doesn’t see sphalerite like that with the barite, only galena. But I suppose that it is possible. Looks like a really old specimen and could have come from most any small surficial deposit. There are/were a lot of them throughout the state.
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