2 pcs Scientific Instruments:1 x refractometer & 1 x Small Diffraction Spectroscope
Distinguish naturally colored diamonds
Distinguish natural stones from synthetics
Analyze a loose or mounted stone’s spectrum
1. Quick and accurate identification of single biaxial gems.2. Unique design, extremely low power consumption and easy to carry.3. Through strict quality and safety standard test, long – term failure service life.4. High quality and high accuracy measurement results.
Length: 55mm
Diameter: 15mm
Inside Instruction: Diffraction Type
Gemstone refractometer index is a very important optical parameter. The gloss of the gem can be determined by this parameter.
All kinds of gems can be determined according to the index of refractive index, because different gemstones have fixed refractive index.
In addition, double refractive index can also be measured.
This parameter can be used to determine whether a gem is a uniaxial crystal or a biaxial crystal.
This kind of gem refractometer is small and light.
Easy to carry, very ular in jewelry industry.
colour:silver & black
Material:Stainless steel + aluminum alloy+Aluminum
size:11x3x6cm

Package Contents:
1 x refractometer
1 x refractive oil (about 2-l)
1 x Instruction manual
1 x battery
1 x Small Diffraction Spectroscope
1 x Leather Carry Pouch
Only the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.