[Rockhounds] Color of Minerals

[Tim]

Many, many lapidary materials can turn your oil just about any color. I have
never figured out why some do and some don't; it probably has to do with
their hardness and composition. For example, some opaque opals I have cut
turn the oil the color of the rock almost instantly. Another one that comes
to mind is Psilomene(?) which turns it black in about 1 second :)

Tim Fisher 
Ore-ROCK-On! 
Email address at http://OreRockOn.com

-----Original Message-----
From: rockhounds-bounces at lists.drizzle.com
[mailto:rockhounds-bounces at lists.drizzle.com] On Behalf Of Robert Betty
Thomson
Sent: Monday, March 16, 2009 11:03 AM
To: rockhounds at lists.drizzle.com
Subject: [Rockhounds] Color of Minerals


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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