The big silver "X" was popular in the mid-1980's. This one had tarnished in my jewelry box, but polished up nicely. It is a good-sized pin -- 2 1/2 inches across and 1 1/2 inch tall. The photo shows it next to a quarter.
No scratches. Clasp and pin are very sturdy. Back is stamped ND 925
And the bonus? A pair of silver tone pierced "X" earrings that I have not worn for years. I'm adding these to this listing at no additional charge.