Almost all main elements are required in order to reach fine art glass.
EARTH, keeps silica mineral inside which is the main ingredient of making glass. FIRE, melts the glass at temperatures of 1200 C and allows the creator to give shape to glass design for final. AIR, is essential for re-sizing the glass as well as identifying the final shape. WATER, is for cleanse and cooling down.
It is the Artist’s own comment to give glass it’s final elegant shape by using these natural elements.