Learn to Use a Refractometer (Video)

This refractometer tutorial video will show you how to find a gem's refractive index, birefringence, optic character, and other properties.

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Are you having trouble taking refractometer readings? This tutorial video will demonstrate how to determine a gemstone's refractive index, optic character, and other properties with this instrument. Your refractometer can provide important clues for accurate gemstone identification.

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This article is also a part of our Gemology Tools Mini Course, in the unit Measuring Optical Properties.

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Kyrylo Gubariev, Graduate Gemologist (GG, AJP)

Kyrylo Gubariev, Graduate Gemologist (GG, AJP) is a gemologist with a passion for sharing his knowledge with fellow gem lovers. Originally from Ukraine, he is currently based in Bangkok, Thailand.

Addison Rice

A geologist, environmental engineer and Caltech graduate, Addison’s interest in the mesmerizing and beautiful results of earth’s geological processes began in her elementary school’s environmental club. When she isn’t writing about gems and minerals, Addison spends winters studying ancient climates in Iceland and summers hiking the Colorado Rockies.

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