In the past few quilt shows that I have been to I have noticed that one of the big things has been a sparkly thread. It is just a hint of sparkle nothing crazy but it is definitely picked up in the light and it appears to be more than just metallic. I've looked at a few online YLI silk and Superior Glitter but I'm not sure if these are the ones. The Superior Glitter seemed really chunky (?) in the picture so I'm not sure. One quilt I'm thinking of in particular is Sherry Reynolds' America Let It Shine. She did have crystals on the quilt but she also had some kind of sparkly thread. There were quite a few at the AQS show in Lancaster as well that utilized this type of thread.
Does anyone use these threads and/or know which ones are not too crazy to work with and give that little hint of sparkle?