jodaisy, I too use Flower Soft Ultrafine 'Sand' which I got from Our Daily Bread designs
is a card I made for my DH for our 20th Anniversary using the Flower Soft.
I also have embossing powder that mimics sand, which I bought at JoAnn's many years ago....I'm sure you could do a search and find it. If all else fails, you could use a course sponge and ink to create a sandy look. Good luck!!