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Re: Shocked Quartz (cleavable)

jj,

Shocked quartz as it pertains to impacts usually refers to compression, shock
lamellae and breaks in microscopic crystals. Not sure what you bought in the
store unless you have some coesite or other impact material. If you're
concerned about radioactivity, you can make arrangements with a local geology
department (school, government, etc) and have them checked with a geiger
counter.

Then all you'll have to worry about is toxic minerals.  :-)

Gene



JJSwaim wrote:
> 
> Hi to all list members,
> 
> With regard to toxicity in specimens, how can one distinguish between
> shocked quartz from a nuclear test site and shocked quartz from an
> impact site?  This is of particular importance to me as I have eight
> specimens in the area on my computer desk.  I purchased them from a
> storeowner who did not even know what they were, but said they were from
> Peru.  Whether this is true, I have no idea.  Never occurred to me they
> might be the result of nuclear testing.  Any advice would be greatly
> appreciated. Thank you.jj
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