Could be quartz? What sort of feel in the way of smooth or smooth and waxy? How about a sunlight picture of it? Camera instead of cell phone?
and there is no such thing as stupid just b/c you don't know. Sometimes I forget what the names are of certain crystals. Now what I do is take a picture of them, identify them, and then print the picture out, and then write on the bottom the names so that I can learn them. So I more I know, the more I don't know anything (as the saying goes).