Glass is an amorphous solid made from natural raw materials limestone, soda ash and sand by melting at very high temperatures. At high temperatures glass is liquid in nature and it becomes solid upon cooling. Glass is hard, brittle, transparent or translucent when in solid state. Glass is used in many aspects of daily life as industrial or household objects or their parts. Glass samples are subjected to various destructive and non-destructive testing to assess their end-use suitability.