INSTRUMENTS

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See also the most up-to-date book Tables of Gemstone Identification

NEW !!!         ORDERING FORM

Measuring the refractive index of a faceted gemstone with a value higher than 1.81 used to be impossible or very difficult, because the standard refractometer has a  max. range of 1.81.

Once the synthetic moissanite got on the market the jeweller got a new problem to distinguish diamant from synthetic moissanite because these two stones gave the same reaction with a diamondtester based on the thermal conductibility

The GEMMETER is a very accurate instrument to check a big parcel of faceted gemstones very fast. 
For exemple a parcel of rubies mixed with garnets or glass simulants, or a parcel aquamarine gemstones mixed with blue topaze, etc...

The GEMMETER is a brand new and useful instrument. 
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Untill now the gemmological refractometer was the primary and one of the most powerful tools in gemstone identification. A typical refractometer will measure the refractive index of faceted stones, transparent to near opaque, whether loose or mounted up to an R.I. value of 1.81.

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The GEMMETER works as digital infrared instrument with 2 x 16 points LCD display for meter-reading of the refractive index up to R.I. 3.094.

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The GEMMETER can be used for a refractive index between 1.270 and 3.094

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No use of refractive index liquid is necessary. You only need a faceted gemstone with a good polished surface of min. 2 mm

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The applied infrared polarizing filter provides a precise measurement of birefringence in the same order of magnitude than the R.I. A microprocessor searches in a data base for all gemstones within comparable values of the measured R.I. and birefringence.

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The GEMMETER works with a 9 Volt battery. This new instrument was designed in compact size of 8 x 15 x 3 cm, also for gem buying trips.

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The Database is in English or German, other languages are available on request.

Price : 650,-
excl. VAT and shipping

Ordering by E-mail

ORDERING FORM

 

Orderinfo:

bulletOrder: per Fax, e-mail or our website
bulletPayment: in advance / Bank transfer
bulletDelivery: after payments received, quick
bulletFor companies in EU, by announcing the VAT ID-Nr. No charge of VAT, the same for the export.
bulletShipping cost: in EU 15,00 out of EU the actual cost

 

 

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