Hardness Pencil with Material of Natural stone for getting Hardness of gemstone

Model No: FMH-5

Specification:

Description and Usage:

Those minerals are mounted in five metal pole respectively,use the corner of those mineral to scratch the gemstone,you will get the hardness according to the nick you scratch,if there is a nick after you scratched,the sample's hardness is lower than the standard hardness pencil;if there is no nick after you scratched,that means the sample's hardness is higher than the standard hardness pencil.

Matters need attention:

1.use the indirect-vision method to estimate the hardness of the sample.

2.find a inconspicuous place,use the talc-l or plaster-2 to scratch the sample,if can't do,that means the sample's hardness is higher than the standard hardness pencil,so pls use the higher pencil to scratch,repetitive operation,if there is a shadow nick,that means the sample's hardness is amoust the same with the standard hardnedd pencil,then use the higher hardness pencil to scratch the gem,if there is a deep nick,means sample's hardness is lower than the standard hardness pencil.so in this way,we can get the hardness of gem or the scope of hardness.

3.when you scratch,don't too heave or too light,just proper vigor.

4.direct test method cost damage to the gem,so pls use it proper.generally speaking,we won't use this method to the finished gem.

Applications: Gemological Laboratory, Gemology school, Jewelry industrial

Shenzhen Fable Jewellery Technology Co.,Ltd was established in 2006, who located in Shenzhen which is called Chinese Jewelry Capital. Shenzhen, with its unique geographical location and development advantages, is the largest international well-know jewelry manufacturing base and trade set scattered places. It is also the international information center of jewelry industry as well as training center of jewelry appraisal.

Fable focus on research and development, producing and marketing jewelry detectiona and identification instruments. It specialized in Gem Microscope, Gem Refractometer, Table Spectroscope, Hand-held Spectroscope (Grating Spectroscope and Prism Spectroscope), Calcite Dichroscope, Table Polariscope, Portable Polariscope, LW/SW Ultraviolet Lamp, Optic Fiber Illumination ( Cold Light Source), Diamond Proportion Tester, Hardness Pencil, Gem Indentifying Travel Lab and so on. Some products are patented in China.

Fable insists on the principle of "Excellent Quality, Reasonable price, Honesty, Co-operation" and take firm steps to achieve continuous development at home and abroad by offering advanced products with competitive prices and better service.

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