Glass block product is also known as glass brick , which is an architectural element made from glass. They can be vary in color, size, texture and form. Glass bricks provides visual obscuration during light admission. Glass block product can be used in walls, skylights and sidewalk lights. These blocks are widely used in various residential and commercial establishments. The process of manufacturing of glass bricks is controlled by thermal treatment which increases its strength as compared to normal glass. When it is broken it does not segregate into sharp edged pieces.