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A Gemological Refractometer is your primary and most powerful tool in gemstone identification. As with any typical critical angle refractometer, it will measure the Refractive Index of faceted stones, transparent to near opaque, whether loose or mounted (in many cases), up to an R. I. value of 1.81.

 

How do you clean a gem refractometer?

Removing Tarnish From a Refractometer Hemicylinder

 

Mix a small amount of cerium oxide with distilled water to make a thick paste.

Take a piece of cotton, like an old T-shirt, dab it in the paste, and transfer some of the mixture to the refractometer hemicylinder.

 

 

What does a refractometer do?

Refractometers measure the degree to which the light changes direction, called the angle of refraction. A refractometer takes the refraction angles and correlates them to refractive index (nD) values that have been established. Using these values, you can determine the concentrations of solutions.

 

What instrument do scientists use to see gems?

A visible spectrophotometer shines a narrow beam of light through the gem by scanning through a series of wavelengths, beginning at the blue end of the spectrum through to the red end.

 

How do you test gemstones?

The first step is to check for any inclusion on the stone with the naked eye. If you’re unable to see any inclusions with your naked eyes, then use a magnifying glass of at least 10X magnification to find out if the gemstone contains any inclusions.

 

it is widely used in jewelry stores, gem workshops, museums & collections, auctions, laboratories and etc. If you have any questions or need help to decide which digital gemstone refractometer or gem testing polariscope is better for you, please don't hesitate to contact us.