HARDNESS PENCILS X8 (MOE 2 TO 9) + PLATES X3
Quicktest
£99.5
Summary Set of ten hardness testers. 8 hardness picks ("pencils") from No.2 to No.9. 1 Glass plate (hardness 5.5) 1 Brass plate (hardness 3.5) Also 1 streak plate (to test a mineral's streak colour) 1 magnet 1 polishing stone to keep the tips sharp Each 'pencil' has a tip of a different hardness from No.5 to No.9 on the Moe scale of hardness (see 'Further Information'). Is it easy to use? Yes. See which will scratch your sample and which will not. Limitations Hardness varies from sample to sample, and it can also be different in different directions. These are for testing minerals, e.g. out in
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