Thank you, for your answer, jamey. Very interesting. I know only the site of Bida in Nigery for glass production. Have there been others as well? I find the pattern interestin. They look for me as a copy of there scarf tatoos. I had post three images but can't find the third so I send it again. Sorry for the two error messages, the answer was send as soon as I pressed enter. ? I will try to manage this site!

Thanks renaid