Such a great little cocktail dress! And I'm with the Lurex crowd--this appears to be a fabric with Lurex shot through it, rather than an allover lame'. Lurex isn't usually referred to as a yard good, as is lame', but a yarn or thread used in woven or knitted fabrics for a metallic effect. (Lurex is used pretty generically these days, like Kleenex, but is a brand of metallic yarn/thread). Some metallic fabrics have more Lurex in them, some less, lending varying degrees of metallic-ness (if that's even a word!). I've never used the terms "lame" and "Lurex" interchangeably (that's what I was taught in sewing class and when I sold fabric in a Singer store--that they're not). But from the photos I can't tell for sure if all the fibers in your dress are metallic or just some. If they all are, I'd call it a lame'; otherwise wool (or whatever it is) shot with Lurex is a more apt description.