Ruby filter RF100

Ruby filter RF100

45,00 €

excl. VAT

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Available from stock

Color filter for assessing cut and uncut red and pink stones, makes color changes visible

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Artikelnummer RF100 Kategorie Tags , ,

Description

The ruby filter allows some stones to appear in a different color with its specially colored glass and helps in the assessment of e.g. red gemstone lots. When viewing red or pink stones under the ruby filter, only those stones that are colored red by chrome will glow red.

  • Rubies therefore appear clearly red. Synthetic rubies, red spinels and chromium-rich pyrope garnets also have a clear red coloration.
  • Other red stones, however, such as almandine garnet, red tourmaline or ruby imitations show no reaction under the ruby filter. The ruby filter can also be used to identify composite stones (doublets or triplets) and glass imitations.
  • Synthetic emeralds from the flux process appear in a striking, very intense red color under the ruby filter. It already conveys the suspicion of a synthesis and thus calls for further special investigations.
Gemstone examination preferably with Chelsea filter or ruby filter

Color filters are no substitute for a complete laboratory analysis – but they do provide immediate, precise color information that creates a decisive advantage in the trade and in professional appraisals, for example when purchasing gemstone lots.

Product details:

  • Gray lacquered metal housing with optical glass
  • Filter glass: Ø 19 mm
  • Dimensions (L×W): 90 mm x 30 mm
  • Weight: approx. 21 g

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Ruby filter investigation in practice

The ruby filter is an extremely useful screening tool for the initial assessment of red gemstones. In his latest information video, gemmology influencer Dimitri Zlatev shows how the ruby filter from KRÜSS Gemmology is used professionally.

All of Dimitri’s videos can also be seen on our YouTube channel.

Color filters & Cold light sources - efficient screening tools for red gemstones

For a reliable investigation, we recommend a cold light source from the KRÜSS store. It allows the light to be positioned exactly where it is needed – flexibly, precisely and without any disturbing shadows.

Cold light sources are indispensable in the gemmological field, as they illuminate even complex-shaped objects evenly and without shadows using a double light guide. Our models impress with their mechanically adjustable intensity without color change and a long-life halogen reflector that ensures consistently high light quality.

Want to find out more about using cold light sources?

You can find practical examples of a wide variety of applications with cold light sources in the article: Separating valuable rubies from spinels and testing gemstone solders.

Background knowledge on the use of cold light sources can be found in the methods articles Spectroscopy or Microscopy and Using color filters

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