There's just one thread that I really, really love that isn't cotton based. That's the Altin Basak gold (silver and bronze too) metallic. I THINK it's called Nakis Simi but I've long since lost the label!!! I can just tell you that it was stonking good value for money as I've had it for years and years and used it a great deal. It comes in a small cone.
Anyway, that was my next 'target' for the very large beads and you can see it below. Do I love sparkle? YES I DO!!!
Also shown is one of the beads I'm using too.