Smithsonian Rock Gem Definitive Guide Rocks Minerals are books that I have ( 3 different ones ) for overall guide. I also have for region specific books an rocks etc that pertain to my area here in Canada. For me I have found these very useful. The info on the fire agat I got from this site: Mexican fire agate
Trying to stay warm up here, minus 30 right now and getting colder for the next 3 days...Take care mamabear & have a good one...... Dave
Trying to stay warm up here, minus 30 right now and getting colder for the next 3 days...Take care mamabear & have a good one...... Dave
