Mohs Hardness Test Kit 10 Pencils – Gemstone, Stone, Glass, Ceramic Tester

Attention:  

The use of the hardness pencil is damaged to the sample and the hardness pen itself. Please use it with caution! ! ! !

When using, please scratch the sample lightly with a hardness pencil.

Please select the part where the sample is not conspicuous or not the main surfacefor testing. Please do not choose the polished surface for faceted and curved gemstones.

Mohs hardness is not a specific value, but a rough range of hardness. The appraisal result of this product is only used as auxiliary evidence and cannot be used as direct evidence to directly judge the gemstone species.

The top of the hardness pen is inlaid with pure gemstones with Mohs hardness, representing corresponding hardness.