Hardness Sets

Hardness Sets
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Gemstone Mohs Hardness Pencil

Hardness Sets   The scale in increasing order of resistance to abrasion is:5-9 1.     APATITE 2.   &n..

$60.00 Ex Tax: $60.00

Gemstone Mohs Hardness Pencil

Hardness Sets   The scale in increasing order of resistance to abrasion is:1-10 1.     TALC 2.   &nbs..

$200.00 Ex Tax: $200.00

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