HARDNESS PENCILS X8 (MOE 2 TO 9) + PLATES X3
HARDNESS PENCILS X8 (MOE 2 TO 9) + PLATES X3
HARDNESS PENCILS X8 (MOE 2 TO 9) + PLATES X3
HARDNESS PENCILS X8 (MOE 2 TO 9) + PLATES X3
  • Load image into Gallery viewer, HARDNESS PENCILS X8 (MOE 2 TO 9) + PLATES X3
  • Load image into Gallery viewer, HARDNESS PENCILS X8 (MOE 2 TO 9) + PLATES X3
  • Load image into Gallery viewer, HARDNESS PENCILS X8 (MOE 2 TO 9) + PLATES X3
  • Load image into Gallery viewer, HARDNESS PENCILS X8 (MOE 2 TO 9) + PLATES X3

HARDNESS PENCILS X8 (MOE 2 TO 9) + PLATES X3

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Ref: HARDNESS-2

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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 the field. They are not suitable for use on cut gemstone (jewellery) - you scratch the stone, the stone becomes worthless and/or your customer sues you.  

Moe

The  Moe scale of hardness goes like this:

1 Talk

2 Gypsum

3 Calcite

4 Fluorite

5 Apatite

6 Orthoclase

7 Quartz

8 Topaz

9 Corundum

10 Diamond

 

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