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Author Topic: Please id this stone  (Read 2924 times)

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sealyons

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Please id this stone
« on: September 10, 2022, 12:54:27 PM »
can anyone identify this stone
thanks in advance
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sealyons

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Re: Please id this stone
« Reply #1 on: September 10, 2022, 12:55:27 PM »
one more pic
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vitzitziltecpatl

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Re: Please id this stone
« Reply #2 on: September 10, 2022, 04:55:29 PM »
That shot's a bit too close for me to guess what it is.

Looks like some colorplay in the first photo - made me think of fire agate.
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R.U. Sirius

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Re: Please id this stone
« Reply #3 on: September 10, 2022, 06:03:11 PM »
It'll be easier if you also post a regular photo, not just macros, with a coin, a hand, or a banana for scale  :smiley:

Also, do you know where the stone was found?
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sealyons

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Re: Please id this stone
« Reply #4 on: September 13, 2022, 08:18:35 AM »
second pic was found in an old NY Cemetery could be from anywhere
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AgateLicker

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Re: Please id this stone
« Reply #5 on: September 14, 2022, 08:10:06 AM »
Second is mafic intrusive. Look into grading relationships between gabbro, diorite and granite; you'll find something similar in the intermediary classifications. Looks like high silica, plagioclase feldspar and lots of biotite mica. Good luck!

May be gravel fill, may be off a monument- diorites are and were commonly utilized for both 'cause it's tuff stuff!
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