Thanks to aggressive publicity campaigns sponsored by the diamond industry, anyone buying a diamond can confidently go into the transaction armed with enough information to ask the right questions. In the pre-purchase stage, you’ll likely query the seller about the five C’s: carat, cut, clarity, color and cost. As long as you trust the jeweler, you can be confident about the value of the gem you’re interested in based on his or her answers. But what about pearls? What questions do you ask? What