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
Lilyvale, The Rocks decades of the 20th century. The buildings on the site combine to form an interesting group, reminiscent of the lively and diverse early streetscapes and urban scale of The Rocks. "Lilyvale" was listed on the New South Wales State Heritage Register on 10 May 2002 having satisfied the following criteria. The place is important in demonstrating the course, or pattern, of cultural or natural history in New South Wales. "Lilyvale" (176 Cumberland Street) is an integral component of a group of 19th century houses in this section of Cumberland Street, which collectively illustrate the range, diversity and urban scale of