It can be risky to divide the cooking space from the living spaces with an opaque barrier, especially for less than roomy kitchens—you lose light and flow. But not with glass block. With proper ...

Ordinary window glass is made of silicon dioxide mixed with other chemicals, such as sodium oxide (Na 2 O), magnesia (MgO), lime (CaO) and alumina (Al 2 O 3), which give it extra strength.

The brick can be used to replace windows or other glass in office blocks, buildings and even bus stops.