It's a lovely item Terry and looks great quality to me. No wonder I was stumped when you first showed it to me ! I would never in a zillion years have guessed Mexican !!!
When faced with such a piece, many collectors wil have to revise their ideas about Mexcian glass, me included.
I don't think Ivo was suggesting that it's actually quartz but just that the Mexicans use that word to denote high quality crystal.
I have learned to read Ivo's words carefully and when he says "high quality crystal" he means HIGH QUALITY crystal.