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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We verify that reviews are from genuine customers by matching them to a sale or transaction. People are only invited to leave a review after purchasing from the business.
Our products help you buy, value and sell at auctions and fairs, in the shop, or trading online. We are experts in chemical and electronic test equipment and supply most pawnbrokers, precious metal traders and jewellers in the UK.
