Rosiwal scale with corundum with a base value of 1000. The Rosiwal scale is used in mineralogy in the same way as Mohs scale and Knoop scale. Rosiwal scale The Rosiwal scale is a hardness scale, with its name given in memory of the Austrian geologist August Karl Rosiwal. The Rosiwal scale bases its measure on absolute values, unlike the Mohs scale whose values are relative values, its interest is relegated to the amateur or an approach that makes it useful in the research field ('in situ'). The Rosiwal method (also called Delesse and Rosiwal) is basically a method of petrographic analysis
147 George Street, The Rocks own right. The group is an important part of The Rocks Heritage Conservation Area being sympathetic in scale and character and an extension of the remaining earlier buildings of George Street, presenting a unified streetscape. The buildings are tangible evidence of the redevelopment of The Rocks in the last decade of the 19th century and the first decade of the 20th century, the period before and after the plague outbreak. 147 George Street has high social significance as a contributory element associated with the historic character of The Rocks, which is held in esteem by the local community and to