Tom, I don't believe you get the prices you're quoting, and I don't believe you actually know how to value gems. Maybe if I had just stumbled across you a few days ago, I would. But now, even the short few months I've had the displeasure to know about your existence, I've watched you lie and fail so often that I'd have to be as foolish as your business partners to believe you about anything.
Go ahead, prove us all wrong. All you have to do is provide the prices you purchased your pebbles for, and the prices you receive. Somehow, I just know even that low hurdle will prove to be impossible for you. It will be fun to watch you impotently flail around trying, though.