Dave, it was an honor to meet you. I hope to see you again at future get-togethers.
I was too dazzled by the stones Mr. Awan had to ask any intelligent questions 🙂
I did find a couple of references which may be pertinent.
http://gemologyonline.com/Forum/phpBB2/viewtopic.php?f=20&t=12941
http://www.gia.edu/gems-gemology/WN13-GNI-greenish-blue-spodumene
Does this look like the same material?