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Checking the quality of gemstones using the refractive index

Precious and semi-precious stones exporters

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KERN

ORA 1GG

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Analogue refractometers

Application number: EN - 1532

When exporting gemstones, quality control is an important control process to verify the authenticity of the stone. Each gemstone has its typical refractive index due to its composition and crystalline structure. The refractive index quality control test is a quick and elegant method of inspecting and analyzing the stone

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Additional information

When exporting gemstones, quality control is an important control process to verify the authenticity of the stone. The refractive index or. refraction is the most important signature of a gemstone. Thus, measuring the index of refraction is the first step in correctly identifying it. Because each gemstone has its own unique refractive index due to its composition and crystalline structure, refractive index quality control testing is a quick and elegant way of evaluating and analyzing the stone

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ORA 1GG

Refractive index

1,30 nD - 1,81 nD

€ 250.-

DAkkS calibrations are also possible on site

All prices plus VAT and shipping costs valid until 27.03.2026

We would be happy to advise you personally:

Ralf Gutbrod

Tel: +49 7433 9933-306

ralf.gutbrod@kern-sohn.com
KERN & SOHN GmbH

Ziegelei 1

72336 Balingen, Germany

info@kern-sohn.com www.kern-sohn.com