What are the crystals in my hand cream?

I've found that once hand cream is open a week or two they often get little crystals in it. It doesn't seem to affect it's benefits but they do stick to me a bit once cream has rubbed in. Does any1 know how to avoid this?What are the crystals in my hand cream?
sometimes these crystels are used to lift dirt or impureities that are found in your skinWhat are the crystals in my hand cream?
It's nothing to worry about, sometimes the glycerine can crystalise slighty once the air gets to it. It happens with my L'Oreal moisturiser.





You can't really avoid it, maybe just make sure it's tightly closed when not in use.