How do I identify the fabrics

Since they are not silk (to test out silk you scrunch the fabric and if it holds wrinkles and doesn't have a definate warp or weft weaving line it's either a silk or poly blend) Cotton wrinkles terribly if it's 100% plus ther is a warp and weft in it. You can be pretty safe in listing it as a poly blend. The other thing about silk is that it's expensive as sin. You might pull a few strands from the end of the fabric and put them in an ashtray or fire safe tin and light a match to them. If the fibers curl up into a stinky hard mass its a poly blend. If they burn to ash it's a natural fiber. I hope this helps some. I'm up lte with a fractured hand that's hurting like crazy and decided to check out mylot to see if there was something to take my mind off the pain...I was right, it helps.

I seam to me that you have silk, if you have a little bit of polyester it might not be much. I wouldn't buy on e-bay,I've been scam twice not for clothes.I never receive what I had ordered and Paypal had to reimburse me.Good luck.

I know this reply is late, but maybe it will help you in the future (or help someone else). You can do a "burn test" to determine what fibers are in the fabric. http://www.fabrics.net/fabricsr.asp