FIBER FLAME ODOR RESIDUE
Cotton Luminous, rapid Burning paper Fine, gray
Silk Slow oran/yellow Burning hair Brittle bead
Wool,hair Slow, blue Burning feathers Brittle bead
Rayon Sparks, orange Burnt paper Black ash
Acetate Rapid, sparks Vinegarish Hard bead
Nylon Melts, no flame Like celery Hard bead

Here is a chart on determining a fabric by burning it. Hope it helps.

Baaaaaah!- Sorry could not resist