Evaluating Jewelry: Understanding Platinum & Diamond Auctions - Is It Worth It?

Question
I won an auction on bidz.com and now I'm not sure if these earrings are worth it. The only description I'm getting is (900 Platinum and Genuine Diamonds) They are studs and I'm stuck. Does this description mean any thing to you?

Answer
HI ISHA,
IF I WAS YOU I WOULD FIND OUT A WHOLE LOT MORE. WHAT IS THE WEIGHT AND QUALITY OF THE DIAMONDS, WEIGHT OF THE EARRINGS SO YOU WOULD KNOW IF THERE IS ENOUGH PLATINUM TO COVER THE COSTS. SOUNDS LIKE YOU BOUGHT 'A PIG IN A POKE'. TRY TO EXTRICATE YOURSELF FROM THIS DEAL OR AT LEAST MINIMIZE THE COST SO IT IS AT LEAST WORTH A LESSON IN BIDDING. THIS DESCRIPTION MEANS NOTHING.

THANKS

PETER