Cargille Labs

Services to the sciences since 1924

Gem Refractometer Liquid

Cargille's Gem Refractometer Liquid has a refractive index of nD = 1.810 @ 25° , the highest of any liquid not containing arsenic. As the name implies, it is widely used with gem refractometers as a contact medium for the identification of gemstones. This light yellow liquid can also be used to reduce or eliminate glare from a gem's surface, facilitating inspection of the gem's interior for inclusions.

This liquid is supplied in an amber glass bottle. The cap has a glass applicator rod attached to it on the inside, designed to deliver a small droplet.

To ensure the liquids maximum shelf life, users should keep this liquid tightly sealed after opening, store it away from direct light and in moderate temperatures.


Cat. No. Desc Size Price ( USD )
19160 Gem Refractometer Liquid
nD = 1.810 +/- 0.005 @ 25°C
10 grams $60.00

For lower index matching liquids please refer to our Refractive Index Standards

All prices are subject to change without notice. Please contact us to confirm prices.
Site Last Modified January 16, 2017
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Web Resources

[ FSU Microscopy Reference ]: Excellent site for information on light refraction, microscopy, microphotography...

[ Modern Microscopy ]: A periodic on-line journal devoted to the world of microscopy. Every issue we will present articles, interviews, book reviews and columns by some of the most experienced researchers in the field.

[ McCrone Institute ]: Illinois not-for-profit corporation devoted to applied microscopy...

[ McCrone UK Ltd ]: