Now, slowly put the head of a small pin in some glue which is used specially for fabrics. Now take the pin out and put a very small drop of the glue on the belt buckle, when you want to stick the rhinestone on it. Be careful while using the glue. You should not use too much glue as it will make the whole process look untidy. Now, check if the rhinestones are covering these glue dots. If you are using bigger rhinestones, you can take the help of a cotton swab.