Help!!! I recently decided to wear a necklace I had made about 3 years ago out of leather and gemstones. I did not use any clasps on the ends and have been tying it to the length I wanted each time I wore it. This time as I tightened the knot the ends broke off in my hand. It was as if the leather had dried out and cracked or maybe it was faulty to begin with. How do I keep this from happening again? I have made several of these necklaces as gifts and haven't heard of this happening to anyone else. What went wrong? Thanks for your help.