Description
Mohs Hardness Testing Pencils: 3-9 of the Mohs Scale of Hardness. Mohs minerals are set inside brass holders and bonded to a wooden handle, numbers 3 & 4 are manufactured from metal alloys with a hardness that corresponds to the scale.
Mohs Hardness Testing Pencils: 3-9 of the Mohs Scale of Hardness. Mohs minerals are set inside brass holders and bonded to a wooden handle, numbers 3 & 4 are manufactured from metal alloys with a hardness that corresponds to the scale.
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