In the forum here there's often a discussion about secondary minerals, green, blue etc
not to determine without analyses...
There is an easy solution...
http://www.attminerals.com/x-ray_diffraction_service.htmat the current USD to Euro rates (
http://www.xe.com/ucc/) an analyses is only 30 euro...
so, the price of a 1/2 dinner with your wife (who wants that?) for an analyses

Cheers!
We cater to Foreign Customers as well . . . we are here to serve everyone! Our service is 30 Euros or 4560 Yen or whatever you use that correspomds to 40 US Dollars. . . . payment questions just ask us. Your envelope from anywhere in the world with just regular postage is very economical for you to send and it takes only about five days to reach us. We can email you the Full Report and that is immediate! (If you prefer postal service we can do that too). Due to the undervalued US Dollar you will probably find that our service costs less than in your country. Again we suggest you email us first as to what you intend to send.
attard@attminerals.com . ... Please send samples to:
John Attard
ATTARD'S MINERALS
P. O. Box 17263
San Diego, CA 92177.
USA.