| Specification: | Kode : GT.011
Name : Gemstone refractometer
Price : Rp.5.250.000
Size : 0, 4 kg. / 11.00 x 6.00 x 3.00 cm
Accracy : 0, 01 nD
Illumination : Internal LED illumination with momentary swith
Measurement range : 1, 30 - 1, 81 nD
Scala division : 0, 01 nD
Filter : Polarizing filter
Power source : 3 x 1, 5 V button batery
Function : The primary use of the refractometer is to measure the angle at which light travelling through the stone is bent or refracted. This is called Refractive Index ( R.I.) . As Refractive Index is usually different for different gemstones, this provides an important clue for accurate gemstone identification.
Gemmological refractometer also can be used to determine whether or not a stone is single or double refracting.
For doubly refracting stone, based on the difference between 2 readings you obtain from the refractometer, strength of the gemstone' s double refraction ( birefringence) may be computed and it offers an important gem identification aid, as it differs from gem to gem.
Also refractometer is one of the few instruments capable to give you information for opaque stones as well as transparent stones. |
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