From one biker chick to another, you go girl! Algie Rocks!
I'm glad you got your money back. I hope you left the appropriate feedback!
You need to call Capital One!
You need to file a complaint with your state health department.
Are you sure stone isn't just diry and not changed color? A stone that big will show dirt quicker than a small one would and it really makes a difference in the appearance of the stone. If you clean it with sudsy ammonia, it may solve the problem. The warranty problem I would complain to the corporate level at this point. Obviously, the local GM isn't going to help. Use Google to find the corporate address to send a registered letter or call their customer service number.