Salt Rock Egg- Pakistan M162 - Karachi Pakistan Salt rock that has been ground into the shape of a chicken size egg. This material was mined from about 300 feet under ground near Karachi, Pakistan. The color of this material is caused by the salt-loving bacteria, halobacteria, that populated the water that this salt formed from when it evaporated. Don't worry, the bacteria are quite inactive and harmless to people. We have sprayed this batch with a light coating of clear acrylic to make them more stable and keep them from turning chalky later. GREAT PRICE $7.50 each  (You can always remove items from your cart later if you wish)