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Hardness Pencil Set Gem Testing Instruments With 5 Pieces Standard Hardness Testing Pencils FMH-5 5-9

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Hardness Pencil Set Gem Testing Instruments With 5 Pieces Standard Hardness Testing Pencils FMH-5 5-9

Country/Region china
Categories Poultry & Livestock

Product Details

 

Hardness Pencil Set Gem Testing Instruments With 5 Pieces Standard Hardness Testing Pencils

 

Hardness Pencil is used for scratching the rough gemstones. If there are scratches, the gemstone hardness is lower than that hardness marked on the pens.

 

Specifications:
1. Hardness: 5-9
(10 standards of gem hardness: talc-1; gypsum-2; calcite-3; fluorite-4; apatite-5; orthoclase-6; quartz-7; topaz-8; corundum-9; diamond-10)
2. High quality.
3. Gift box package.
4. Packing dimension: 126x97x43mm.
5. G.W.: 0.5kg.

 

Applications:
Gemological labs, gemology schools/institutes, jewelry/gem industry, --etc.

 

 

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