Tre' cool! It doesn't matter as much which turquoise you use, the copper that gives it the color is what causes the reaction. I'm getting ready to order some silver and copper frit from Devardi just to play with the color reactions.
I've got TONS of I-have-no-idea-where-I-got-it glass - a local lady was getting out of soft glass, and I purchased a good portion of her collection. She was running through everything so fast, I was just kinda smiling and nodding. I got a stick of GORGEOUS opalescent bright blue that I really adore, and have no clue where to get more - grump.