hand, burning a small piece of the fringe to smell the ash and smell the smoke, and dissolving the pile by performing a chemical test. References External links The burn test and other methods for fiber identification: Fiber Content Tests Is Your Silk Oriental Rug Made of Real Silk? See The Stocking Story: You Be the Historian at the Smithsonian website. Organic polymers Cellulose Synthetic fibers Silk Woven fabrics