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cat1

Sphere Rock

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cat1

What is this? Perfectly round. Thanks 

 

 

81131995-83C7-42F4-88A0-AC1116DA5003.jpeg

44F52125-F5A7-41D8-BE72-025169474004.jpeg

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ynot

Welcome to TFF!

Where was this found?

Does it feel glassy or waxxy?

How heavy does it feel compared to similar sized rocks?

 

It looks like a large ceramic marble, but that opinion may change with further information.

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cat1

Not waxy. It's smooth. Not glassy though.

Feels about the same weight as other rocks in this size. 

I'm not sure where it was found, since it was park of a relatives rock collection that I acquired. 

 

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cat1

Here’s some of the collection... 

 

F55416BF-677F-4984-B603-8C04B3AE6503.jpeg

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Rockwood

Concretions are common in the most likely source of the ferns, near St. Clair, PA. It would seem a good bet that that is what this is.

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caldigger

The sphere is probably ball mill medium.

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Mark Kmiecik

The second one is most likely Pecopteris sp. Would need closer up better focused photo to be sure. The first is, well -- are there any metal casting factories near where this was found -- metal castings are tumbled in a drum with stone balls of various sizes to remove burrs and flashing formed during manufacture. 

 

Looks like Caldigger pushed "enter" first.

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Rockwood

 

2 hours ago, cat1 said:

relatives rock collection

Sounds like context is a weak argument in any direction.

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