Jade nephrite, China
Photograph courtesty of
The Smithsonian Institution
Talk to a member of the science department of your local high school.
Contact the American Federation of Mineralogical Societies.
Check the phone book for your nearest rock and mineral shop and talk to the owners.
USGS geologists perform continuing research on kimberlites, the initial source of diamonds. Not all kimberlites are diamond bearing, and some of the research is directed to learning what indications you look for during exploration to distinguish fertile from barren kimberlite.