Mohs scale of mineral hardness 77 AD. While greatly facilitating the identification of minerals in the field, the Mohs scale does not show how well hard materials perform in an industrial setting. Despite its lack of precision, the Mohs scale is highly relevant for field geologists, who use the scale to roughly identify minerals using scratch kits. The Mohs scale hardness of minerals can be commonly found in reference sheets. Mohs hardness is useful in milling. It allows assessment of which kind of mill will best reduce a given product whose hardness is known. The scale is also in use at digital electronic manufacturers, for
101 George Street, The Rocks history of New South Wales. The place possesses a degree of rarity as the first site to be the subject of heritage renovations/reconstructions in the 1970s, when the plans of the Sydney Cove Redevelopment Authority to raze The Rocks for redevelopment were still in place. The place is important in demonstrating the principal characteristics of a class of cultural or natural places/environments in New South Wales. The scale and streetscape character of the Phillip's Foote building is representative of early 19th commercial building in The Rocks as a plain two-storey shop with residence. 101 George Street, The Rocks 101 George