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
107-109 George Street, The Rocks Regency Style. The buildings have been continuously occupied for commercial retail purposes since construction in 1861. The building's scale, detailing and alignment to the street is typical of that found along the west side of George Street and lining the harbourside as part of the Business Precinct of The Rocks. The buildings are part of the rich fabric of The Rocks which is highly regarded by residents, Sydney people and visitors and acknowledged by the Australian Heritage Commission and the National Trust as part of The Rocks Urban Conservation Area. The potential archaeological resource on the site is representative of