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but often you will see two shadow edges
The Apex works fine on all 'brilliant' (round) cuts
that 10mm = 20% larger in area which really makes a difference
Pros: you can test rare coins (which must not be filed or stained with acid)
Hardness Pencils, set of 5 Options_Battery but often you will seeSummary Set of five hardness pencils. 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
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