Opal Identification and Value is now out of print (:
http://www.paulbdowning.com/out_of_print.htm), & I missed getting
my copy!! If anyone knows of any copies hiding somewhere, runs
across one, etc., I'd very much appreciate hearing.
Michael, You can check http://www.bookfinder.com from time to time
to see if they get one in. I’ve had luck with this before.