Anyone know what the heck this is? Found in Lake Michigan..

[Rattlehead]

Anyone know what the heck this is? Found in Lake Michigan. Color in pic is pretty accurate. About 6 on mohs rough estimate. Pretty sloppy to cut, like hematite.

 

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[opee]

Wow don't know what it is but that is really cool.

 

[huntsman53]

I haven't a clue but it is very interesting! When I saw the color and the spots that look like some kind of cells, I was going to say a petrified Dinosaur organ.


Frank

 

[war-digs-it]

Cool piece, will keep an eye on this thread...since I'm hungry it looks like a petrified pork shoulder. Extremely interesting gem you found!

 

[Eu_citzen]

What is the lustre like? (on a chipped piece)

Due to the grainy structure sandstone or arkose comes to mind.

 

[Rattlehead]

I have a little experience with sandstone, so I'm thinking that's not it. It bleeds rusty color when cut. Texture is slightly rough and I'm guessing it won't take a glass like shine but more of a matte shine when polished. Sorry...best descriptions I can give!

 

[Rattlehead]

Local expert says granular jasper and hematite

 

[StoneWhisper]

Local expert says granular jasper and hematite

Agreed.. same here as with the Rock Tumbling Hobby site.