No, and I am Sorry about that... I wish I could answer. BUT, I can tell you this: I have been wearing mine for just about a month now (kept on during showers, doing chores + dishes) and it has NOT changed in color!! :). No fading or tarnishing or any visible signs of wear!! Just wanted to put that out there. This is a very nice ring ! Thank You for checking out my Auction! :)
I know, but usually the older JEWELRY with MARCASITE falls out easy, but in my experience the newer stuff is a lot more strong. I have these rings, and wear them in water A LOT, and no missing ones!! Thanks! :)