With our newly revised white papers, we provide an updated resource for anyone deeply involved in gemmology and gemmological testing methods. These publications are part of our offerings, in which experts share their specialized knowledge and present practical best practices. Whether white papers, quick guides, or videos —in the KRÜSS Gemmo Shop, interested parties will find not only high-quality devices but also valuable insights for their daily professional practice.
White papers and technical articles are now available for free
The updated white papers are available for download in the Applications and Methods sections. This specialized gemmological information provides a comprehensive overview of the scientific principles and how the gemmological devices from the KRÜSS Shop work. It answers key questions such as:
- Which device is best suited for which type of investigation?
- How do these instruments work?
- What does their use look like in practice?
Practical articles on gemmological examination methods
Expertise from Prof. Dr. Jochen Schlüter
The white papers are based on a scholarly publication by Prof. Dr. Jochen Schlüter, a certified mineralogist and long-time director of the Mineralogical Museum at the Center for Natural History (CeNak) at the University of Hamburg.
His decades of expertise in research, teaching, and international exploration form the basis for his clear and accessible explanations of gemology.
An offer for anyone who wants to dive deeper
Our goal is to present the fundamentals of gemmology and instrument functions in a way that benefits both beginners and experienced users. The combination of white papers and expert knowledge provides a comprehensive introduction to modern gemstone analysis.
Technical Article: Microscopes
For KRÜSS gemmology microscopes, top quality combined with excellent value for money is a goal we have set for ourselves. KRÜSS Optronic gemstone microscopes are all high-quality stereo microscopes designed specifically to meet the needs of gemmologists. Here is an overview of the available technical articles—including free downloadable materials:
Technical Articles: Polarizers, Color Filters, Spectroscopes
Polariscopes (available in the KRÜSS Shop: PK11-LED Portable Polariscope, PK14-LED Benchtop Polariscope) allow you to observe the optical properties of stones and quickly identify common gemstone imitations. The Ruby Filter makes some stones appear to have a different color and helps in the evaluation of gemstone lots. The spectroscope (HS1504; HS1501; HS15001 and device kit (KL14-1504) produces characteristic absorption patterns for stone diagnosis. Below are the available technical articles with free downloads:
Technical Article: Gemstone Refractometers - Determining the Refractive Index of Gemstones
KRÜSS gemstone refractometers (ER601-LED and ER605) are essential equipment for any gemmological and gemstone laboratory. They measure the refractive index, which provides information about the important characteristics of a gemstone. Check out our technical articles and the accompanying free downloads here:
Technical Article: UV Light - Luminescence Investigation
UV light makes it possible to distinguish many gemstones and decorative stones based on their characteristic fluorescence. Different colors or color changes under various wavelengths help to simultaneously verify natural stones, imitations, and synthetics. These technical articles on the application of our UV analysis lamps UV240 and UV120 are available for free download:
Technical Article: Gemstone Testing Equipment
The diamond testing devices available in the KRÜSS Gemmo Shop (DSP10; DSP30; DSP20) are used to quickly and easily distinguish diamonds from other natural gemstones and imitations, or to differentiate natural diamonds from synthetic diamonds. Here is an overview of the technical articles—including a free download option:
Technical Article: Dichroscopes, Detecting Pleochroism
KRÜSS dichroscopes ( LD10 and HD10) allow for the observation of direction-dependent polychromy in transparent gemstones. When viewed, the device shows whether both images are identical, two colors are visible or even three different colors are visible. With a special colour chart, stones and imitations can be identified. Here are our technical articles and the corresponding free downloads:
New! Many gemstone analyses are now also available as instructional videos
You are currently viewing a placeholder content from YouTube. To access the actual content, click the button below. Please note that doing so will share data with third-party providers.
More InformationExample of a Rubin 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 the videos of our stereo microscopes, loupes, and tweezers tested by Dimitri can also be viewed on our YouTube channel.