[Rockhounds] Color of Minerals

[Kreigh Tomaszewski]

Look at what you have cut recently and see if any of it has a green 
streak. Some substances, like psilomelane, seem to make much finer 
particles when cut and stay suspended in the oil, coloring it. 
Psilomelane will turn your oil black within seconds.

Kreigh


On Monday, Mar 16, 2009, at 13:02 America/Detroit, Robert Betty Thomson 
wrote:

>
> Hello
>
> I was wondering if someone could help me with question. It might sound 
> weird, but here it goes. Is there any rock, gem or mineral that you 
> would cut in a rock saw that would make the oil go and green sage 
> color. I have never come across this in all the years I have been 
> cutting. This one is stumping me. Any way that the oil would oxide 
> itself????????? Hope someone can help. The only thing I can think of 
> is someone was careless and added something to the oil, trying to 
> casue damage Thanks for your help
>
> Robert & Betty
>
>
>
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