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Author Topic: Any ideas of this piece?  (Read 1058 times)

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kent

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Any ideas of this piece?
« on: February 09, 2017, 03:38:49 PM »
A friend brought this over the other day and I am clueless. Has a very unique inner and outer "crust". Scratches fairly readily with my scratch awl.

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*IMG_4724.jpg (97.13 kB . 450x600 - viewed 204 times)
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*IMG_4726.jpg (87.44 kB . 450x600 - viewed 211 times)
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*IMG_4725.jpg (110.8 kB . 450x600 - viewed 202 times)

 
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Ranger_Dave

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Re: Any ideas of this piece?
« Reply #1 on: February 09, 2017, 04:32:05 PM »
Travertine? Looks like it was deposited by a hot spring.
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lithicbeads

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Re: Any ideas of this piece?
« Reply #2 on: February 09, 2017, 04:55:17 PM »
Yes  with possibly a manganese oxide coating.
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Ranger_Dave

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Re: Any ideas of this piece?
« Reply #3 on: February 09, 2017, 10:12:08 PM »
If travertine it might fluoresce under long or short UV. Better under short though.
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