Traditionally, crystal was made with addition of lead. The most prized lead crystal contains 24 percent lead oxide which provides the optimum weight, hardness and color. The addition of lead oxide makes crystal softer than glass and allows crystal artisans to cut and bevel lead crystal with brilliant edges.
The most common causes of abdominal bloating are: 1  swallowing air. 2  constipation. 3  heartburn. 4  irritable bowel syndrome. 5  intolerance to dairy products or other food items. 6  eating too fast. 7  weight gain. 8  overgrowth of bacteria in the small bowel.
It is advised to consult a doctor to rule out any major cause before the disease is irreversible. 1  Constant Bloated Stomach: Extreme Stomach, Belly Bloating Home Remedy. 2  Causes Of Stomach Bloating And Gas: Home Remedies And Prevention.  Bloated Stomach And Abdomen Gas Causes: Diet And Home Remedies.