1.Gem Refractometer: 2.CZ Testing Table 3.Stainless Steel 4.Monochromatic LED Lights 5.Dual power supply

Gem Refractometer

Gemological refractometer,gem refractometer,gemological testerHigh hardness CZ test prism Scale range:1.35-1.81Error: ±0.002 Stainless steel table,easy to cleanBy advanced optic system,shadow edge is straight and sharp,easy to read.There are two ways of inputing the voltage:7batteries and DC3V direct current suply(AC100240V).2ml refractive index Liquid(1.78±0.005) with unique design of the bottle(Proprietary technology ZL200620096730.7)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±

CZ prism LED light source Gemological Refractometer