Silk is one of the more luxurious fabrics available. It comes is so many different weave varieties from sheer and flowy chiffons to rigid suiting. It is a top pick fabric in the fashion industry.
Silk should be dry clean or hand washed. If you want a washed look, was the silk BEFORE cutting out your garment. Once it's washed you can wash it over and over again. Always test a sample before putting all the fabric in the wash. All fabrics react differently.