Mohs scale of mineral hardness testing the resilience of certain flat panel display components (such as cover glass for LCDs or encapsulation for OLEDs). The Mohs scale of mineral hardness is based on the ability of one natural sample of mineral to scratch another mineral visibly. The samples of matter used by Mohs are all different minerals. Minerals are chemically pure solids found in nature. Rocks are made up of one or more minerals. As the hardest known naturally occurring substance when the scale was designed, diamonds are at the top of the scale. The hardness of a material is measured against the scale by
NSW Housing Board Building, Gloucester Street, The Rocks have been removed and replaced. Interior wall and floor tiling and all the sanitary fixtures have been removed. As at 30 March 2011, the NSW Housing Board Building and site are of State heritage significance for their historical and scientific cultural values. The site and building are also of State heritage significance for their contribution to The Rocks area which is of State Heritage significance in its own right. The Model Factory and Workers Dwelling at 120 Gloucester Street, The Rocks and site is of State heritage significance for its historical, aesthetic and scientific cultural values. The site and building