What's color changing glass?

A glass product that needs extra attention is Color Changing Glass. The name speaks for itself, by adding special supplements this glass gets the most beautiful colors and besides changes color and can be made in very beautiful shapes, it also has the quality of being very hard and only really breaks if one drops it on a hard surface. Nowadays, other products besides the smoking pipe are available. Many glass blowers make real works of art which are very expensive to purchase. Because these objects are now looked upon as art, a collectors market is starting to develop in which the design of certain artists can increase in value.