Gemstone Refractometer ER604

A standard compact gemstone refractometer

- Resolution: 0.01 nD
- Measurement range: 1.33 – 1.81 nD
- Na-filter 589 nm
- No integrated illumination,
  suitable for all light sources.
- lightweight  (0.4kg)
- Aluminium housing

Gemstone refractometers are used for the classification and quality control of gemstones. The gemstone to be examined is simply placed on the prism with a drop of contact fluid. The refractive index of the gemstone is read through the ocular of the refractometer. The refractive index is an important parameter in classifying a mineral or gemstone. Each mineral has its typical refractive index, due to its chemical composition and crystalline structure. Our gemstone refractometers are characterised by their particularly sharp image and good readability.

With the sodium filter that only lets through light with a wavelength of 589 nm, the refractometer can be used as a mobile unit with an ordinary light source or with sufficient ambient lighting.

Customers who bought this product also bought the following products:

BM604 for Gemstone Refractometer ER604-LED LED illumination for the gemstone refractometer ER604-LED. € 120.19  (19 % VAT incl. excl. Shipping costs)

Loupe LUSA10 Swiss Axe Diamant 1 - Triplet Magnification 10x, Ø 21 mm. Housing in solid-grade aluminium. Coating is scratch resistant, black anodisation. Foldable design, with click-lock. € 484.33  (19 % VAT incl. excl. Shipping costs)

KSW5000-T Stereo Microscope with Zoom Optical equipment: 10x wide-field eyepieces 0.7 - 4.5x zoom objective Total magnification 7 - 45x Illumination: Incident and transmitted light Dark field Special features: Photo tube and stone holder € 1,091.23  (19 % VAT incl. excl. Shipping costs)

Pair of Eyepieces MSZ5420-N Pair of eyepieces 20x for magnification 14x - 90x (max. 180x with optional doubler MSZ 5418). Fits also for microscopes of series MSZ5000 and KSW5000. € 120.19  (19 % VAT incl. excl. Shipping costs)