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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 and led to the development of the stereograph.
Measures in an absolute scale the hardness of minerals expressed as abrasion's resistance, measured at laboratory, starting with corundum with a base value of 1000.
Knoop scale
The Rosiwal scale is used in mineralogy in the same way as Mohs scale and Knoop scale.
References
Rosiwal scale Wikipedia(Text) CC BY-SA