Not sure about the fabric, feels like maybe silk/sateen, it's soft inside and a little stiffer on the outside. Really cool color change effect- also the diamonds are woven fabric and are pink on the outside but blue inside. Nice tailoring, skirt bells out at the waist.

Vintage 1950's Knee Length Dress Handmade Iridescent Blue Purple Pink Diamonds. Shipped with USPS Priority Mail.