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Post by tkrueger3 on Aug 27, 2010 18:05:56 GMT -5
I post this in the wrong thread, I guess, and got no response, so I'm copying it here. Maybe somebody can 'splain it so my weak mind can grasp the concept. I haven't been able to find any photos of what an opal-bearing rock would look like - particularly one containing white potch, or common opal. I have a fist-sized rock that I made 2 cuts on this morning, and I want to understand what I'm looking at. Here's a pic of the 2 cuts: So, the white stuff - might that be "common" opal, or "potch"? I can't see any sign of color in it at all. If it's not opal, then what is it? Sorry I'm so lame at this geologic taxonomy stuff! Thanks for any help. Tom
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Post by FrogAndBearCreations on Aug 27, 2010 19:38:19 GMT -5
Potch is generally what sand/dirt inclusions be they hard or soft would be called and the common opal being what the stuff with no fire in it is. I have several chunks of common white opal from Turkey and other areas that I wanted for carving, I also have blue, pink, and yellow from Peru.
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