Free images results:

Silk pictures, stock photos and images


Waiting Stock Images
Author: Slidepix
SilkI Stock Photos
Author: Hixnhix
Shell III Stock Images
Author: Hixnhix
Swans Royalty Free Stock Images
Author: Hookinmouth

Also, here are some commercial RF-licensed images that match your search criteria:  
Gold silk Stock Image
Author: Zuboff
Blue silk Royalty Free Stock Photo
Author: Tatisol