Looks like a dralon to me.If its velvet she will know,and it would of cost a fortune.,They always say,It was expensive.viscose rayon is risky.Do a test on the back, with some prochem fabric restore.Leave it a couple of days.If the test is good. No wet cat syndrome wet clean it.After cleaning gently brush it to remove tool lines.If you are unsure you can clean using a solvent extraction machine, but make sure exhaust pipe is vented outside.Avoid painted surfaces but if solvent touches it leave it to dry natually