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)
1 streak plate (to test a mineral's streak colour)
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?
See which will scratch your sample and which will not.
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.
The Moe scale of hardness goes like this:
Free gift details
If you would like one of the following free gifts with this product, select one from “Select your free gift” above.
Hand Reader, large, adjustable, with four lights (lightmag) (RRP $7.00 )
Hanging Balance 100g. (Silver) (RRP $3.00 )
Stand Magnifier, 7X50 (7X mag / 50mm lens dia.) (RRP $5.00 )
QUESTIONS & ANSWERSAsk a Question
Will the number 9 scratch a polished moissanite stone?
Probably not, Moissanite is 9.4.
But don't try, it might. Then you will damage the stone, these are not for polished stones.