Mohs hardness scale

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Standards EN 101
Used to identify minerals according to surface hardness. The set consists of 10 reference minerals: 1 (Talcum) 2 (Plaster) 3 (Calcite) 4 (Fluoride) 5 (Apatite) 6 (Feldspar) 7 (Quartz) 8 (Topaz) 9 (Corundum) 10 (Diamond).
Dimensions: 180 x 120 x 20 mm approx.
Weight: 500 g.