Dear Professors and experts,
I'm Saul. First, thank you for offering us such a nice website for rocks! I now have a terahertz stone and I want it to be identified by an authoritative institution in the U.S. I'm not sure if you would like to do the identification if I pay you money. I can send the rock to you and you can return it to me with a "certificate" or identification result. If you don't do the identification, would you please recommend me an real authoritative institution in this field? Thank you so much!Expecting your reply! Love your site! Bye.