i have recently email nasa for some information. here is the email:

Hi,

My name is Sophia Lucki. I am a grade seven student from toronto Ontario. I attend the gifted program at Transfiguration of our Lord Catholic school. My teacher gave us a project at the start of the year that we have to work on for the school year.  I am very interested in space and NASA's new discoveries. I chose to do mining in space. I visited your headquarters in Washington DC when I visited.  It has always been a dream of mine to go to space.  There are so many reasons i chose this project.  It is very important for us to find alternative resources but you already knew that.  My research has been going very well I even interviewed University of Toronto's Michael Bazzochi, who is specializing in outer space mining. The reason for my email is i wanted to know if by any chance you could send me a sample of a space rock for me to examine and show my class.