Natural occurence?

[GTK96]

Field by the water, SE Virginia...man made or somethin else?

 

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[Paleopilot]

Does this material appear to be a hard stone? I noticed also, upper left of the square, a smaller rectangle. The indent next to your thumb is also interesting. Unless the material is of some type of crystal, the anomalies would probably not be natural.

 

[unclemac]

possible glendonite or similar stone.



the crystal weathers out of the surrounding stone.

 

[Trollfish]

I have a stone on my mantle that has the same exact square hole in it. It is in a riverwashed limestone cobblestone I found in the Ohio river while prospecting. I thought it I had the only one in existence till now. My theory was that a salt or water soluble crystal formed in the rock and then years of weathering left a square hole in it. I have never had it looked at by a geologist, but might now that I have seen another.

 

[skeeterd]

Troll, could we see a pic of your stone please?

 

[yaxthri]

Probably this peble was a piece of rock matrix surrounding a pyrite or other perfect cubic crystal that eventually "fell out" of its case...

Check this pic Pyrite Crystals

 

[gods country girl]

i love rocks..............nice rock

 

[Trollfish]

Skeeterd,
I don't have a pic yet, but I will get it on here when I find time. Essentially the same squarte hole in a purple limestone river pebble. square in the pebble is 1/4" square and deep. Being that I found it in the Ohio river in SE Indiana, I presume it traveled to me from Appalachia via the river. The only place I have seen purple limestone is PA and AZ. I am sure it occurs in OH as well. It is a cool little stone.

 

[B1u3Dr4g0n1]

That is neat, I have found similar as a kid.....now I wish I would of kept them. I have also found, but only once, it was almost a completely square rock with a perfect round circle through it and it is right in the middle of the rock. As a kid I was like, that's weird and then tried to skip it off the water.....stupid kid...lol