Chalcedony

[ToddsPoint]

I found this on along the river near my house a couple of years ago. Glacial till material. Gary

 

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[DDancer]

Thats a fine sample Toddspoint. Neat that you came away with it from glacial till.

 

[fuss]

Very interesting, looks like it might clean up nicely or no?

 

[ToddsPoint]

How would I go about cleaning it up more? Oxalic acid? Gary

 

[fuss]

Not exactly sure what solution to use for it, it looks almost like a silt that's on it. I usually start with a soapy warm water soak, them move on from there. I heard windex does well with clay's and such, maybe try a little on a small section and see.

How would I go about cleaning it up more? Oxalic acid? Gary

 

[Professor of Engineering]

Very nice looking piece!

 

[DDancer]

You can try a bit of vinegar to see if the white crust is calcium based first, hopefully it is, before moving on to stronger solutions. Chalcedony is pretty resistant to most acids. Other than that you can try buffing it with a dremel.

 

[Steve1236]

Super iron out "powder" is what I use to clean all my chalcedony.