Mistaken identity - a fabric burn test

So I began sewing the Vogue 1247 top. You know the one. It's that oh-so-popular-with-the-sewing-bloggers Rachel Comey top. The one I didn't give a second thought to until I began seeing the many positive reviews. Then of course I just had to have one for myself. You, of course, never allow yourself to be influenced like that, right? Anyway, where was I? Oh yea. I began sewing the top the other day. Actually made pretty good progress on it in just a few hours - see? The fabric is a beautiful fiber-unknown piece that arrived in one of those Fabric Mart Fabrics mystery bundles. When it arrived I had guessed it was a polyester charmeuse, so I washed and dried it and placed it in the fabric closet. However, as I was sewing I couldn't help but wonder if what I thought was a polyester was actually silk. Only one way to find out for sure. A fabric burn test! I grabbed swatch of fabric, a lighter and asked hubby to join me in the garage for a little burn