Add Yahoo as a preferred source to see more of our stories on Google. A woman with long hair holds a glass bowl, examining it to determine whether to purchase it. - Galina Zhigalova/Getty Images ...

A Chinese laboratory is the only source of a valuable crystal. David Cyranoski investigates why it won't share its supplies. One of Daniel Dessau's prized possessions is a small crystal of potassium ...

Add Yahoo as a preferred source to see more of our stories on Google. Getty Images You're rummaging through the cabinets at an estate sale, and you come across a set of 12 beautifully etched wine ...