Looks about the same as the other dupioni's to me. I've definitely found something better, going to have to dye it to make it right, but it's going to look great. I was up in LA yesterday and found a bright purple fabric that had an amazing bark effect, but the blue variety of it was monochrome. It was also a linen, so the weave wasn't the same. Very cool fabric, though.
No, it's a rough spun silk. I'm not exactly sure what it's called, but it blends a blue and a black together. I'll post pictures when it comes in and when I've dyed it.