0.003 CZ table gemstone refractometer

gemstone refractometer Refractometer used with contact liquid CZ Testing Table Stainless Steel Monochromatic LED Lights        0.003 CZ table gemstone refractometer   Jewelry Refractometer measures the refractive index of your gems. Besides the RI, a refractometer will also give you the birefringence and optic sign. When possible, it is easier to obtain the optic sign from a polariscope. However, that can’t always be done, so you need the refractometer as an alternate means to determine the optic sign when necessary.As the refractive index of the gemstones are fixed, the RI value becomes a very important reference data; naturally, a Gem Refractometer is absolutely essential for gem identification.

     

Specifications

Material	Aluminum alloy table
Testing Range	1.35-1.85
Accuracy	<=±0.003
Light Source	Built-in Monochrome LED light
Power	Batteries/ DC 3V
Refractive Index Liquid	1.785±0.005
Scale Division	0.01 RI
Filter	Polarizing Filter
Packaging	Metal Box

 

It is much safer ,much ecnomical and more convinent

name	R.I.	birefringence	name	R.I.	birefringence
Opal	1.42-1.45		Apatite	1.634-1.638	0.004
Fluorite	1.45		Peridot	1.654-1.695	0.035
Glass	1.51-1.82		Jadeite	1.66±
Sodalite	1.483-1.487		Diopside	1.675-1.701	0.026
Lapis lazuli	1.50 or 1.67		Syn.spinel	1.728±
Moonstone	1.52-1.54		Chrysoberyl	1.746-1.755	0.01
Chalcedony	1.53-1.54		Hydrogrossular	1.730-1.740
Lolite	1.544-1.553	0.01	Syn.corundum	1.762-1.770	0.008
Crystal	1.544-1.553	0.009	Almandite	1.79±0.03
Beryl	1.56-1.59	0.008	Ruby&Sapphire	1.762-1.770	0.008
Turquoise	1.61-1.65		Zircon	1.925-1.984	0.059
Nephrite	1.61±		CZ	2.08-2.20
Topaz	1.61-1.640	0.009	Strontium titanate	2.409
Tourmaline	1.620-1.644	0.02	Diamond	2.417
Anslusite	1.634-1.643	0.01	Spinel	1.718-1.785
Obsidian	1.50±

      

0.003 CZ table gemstone refractometer