Gemological Gemstone Gem Refractometer Built-in Light, 1.80 RI Oil, Gemological. GIA Tools

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About Gemological Gemstone Gem Refractometer Built-in

After the order, the product usually arrives on your hand for 7-15 days. The Gemological refractometer is considered by many to be the most important of all gem testing instruments. The primary use of the refractometer is to measure the angle at which light traveling 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. Gemological 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. If you have any questions, you can contact us Because RI oil is liquid, it may be confiscated by customs. If confiscated, please contact us. We'll send you a bottle of RI oil.