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This stone was found in a river located in middle Tennessee. We are stumped as to what this may be. Any insight would be much appreciated.

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asked Jun 27 '12 at 21:06

gregory_stutz's gravatar image

gregory_stutz
1111


Thats pretty hard. My guess is that its probably a quartz or feldspar concretion. Although the only way to definitively determine that would be to see it and do some more tests.

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answered Jun 29 '12 at 10:07

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hershel ♦♦
1.6k18

Alright. Thank you for the insight. I think I may find a local geology group or mineral type shop and have it analyzed.

(Jun 29 '12 at 22:09) gregory_stutz

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Sorry, had a problem loading the picture. Here it is.

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answered Jun 27 '12 at 21:07

gregory_stutz's gravatar image

gregory_stutz
1111

It definitely looks like something waterworn. Do you know its hardness?

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answered Jun 27 '12 at 21:43

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hershel ♦♦
1.6k18

Honestly I'm rather uneducated on geology in general. That being said I have no idea how to gauge such a thing as it's hardness. It's definitely very solid. It doesn't crumble at all and I haven't tried to chip it or anything.

(Jun 27 '12 at 21:50) gregory_stutz

Read this article here about hardness - you may find this helpful: http://www.minerals.net/resource/property/Hardness.aspx

Also see if you can determine the streak: http://www.minerals.net/resource/property/Streak.aspx

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answered Jun 27 '12 at 21:54

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hershel ♦♦
1.6k18

Well based on that method it's hardness is higher than 6.5. Systematically tried the penny, then knife, then the steel file. The penny left itself on the stone as did the knife. The file served to polish it a bit (that's the best description I have for it). I don't have any ceramic tile but according to the links provided it won't matter if it's hardness is higher than 6.5.

(Jun 27 '12 at 22:09) gregory_stutz
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Asked: Jun 27 '12 at 21:06

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Last updated: Jun 29 '12 at 22:09

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