E-line Gemological Refractometers

PDF Literature download: Hand-held & Optical Instruments brochure E-line Gemoligical Instruction Manual
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General Information on Refractometers

Refractive Index is one of the most important optical parameters used to identify and authenticate polished precious and semi-precious gemstones.

The E-Line Gemological refractometer is a low cost, lightweight measuring instrument used by jewellers and traders of gemstones to measure polished stones over a refractive index range of 1.30 to 1.81 RI. The instrument can also be used to identify whether a particular stone is Isotropic or Anistropic (uniaxial or biaxial).

For full details on the use refractometer and data relating to the RI of gemstones, please download the instruction manual.

The instrument is made of painted durable alloy and is supplied with an illuminating device, polarising filter and instruction manual.

Specifications

Measuring Range 1.30 – 1.81 RI Minimum Graduation (RI) 0.01 RI Size 30 x 70 x 130mm Weight 400g

Order Code Description 44-861 E-line Gemological refractometer

Contact liquids for use with solid samples

Order Code Description Refractive Index Value (RI) 10-43 Monobromonapthelene (6ml) 1.65 10-61 Methyl Iodide (3ml) 1.74 10-62 Sulphated methyliodide (10ml) 1.79