Frequently Asked Questions | Goldanalytix

Here you find answers to the most frequently asked questions on all topics related to precious metal testing. The questions and answers are neatly arranged according to key topics - so you can find what you are looking for very quickly.

Methodological terms for measuring precious metals


  • Density of a body describes its mass in relation to its volume
  • "Pseudo-density" can be calculated from the dimensions and weight of the object at hand
  • Each material has a specific density


  • Conductivity is the ability of a substance to transfer energy (e.g. electricity, heat)
  • It is measured in megasiemens per metre
  • Our devices measure conductivity using inductive eddy current measurement


  • Diamagnetism = the occurrence of a magnetic field (magnetisation), when an external magnetic field is applied to a substance, whereby the magnetisation opposes the external field. Summary: diamagnetic materials are repelled by the magnet.
  • Paramagnetism = form of magnetism in which a substance shows no measurable magnetic moment in the absence of an external magnetic field, but acquires a magnetisation in the presence of an external field. Summary: Paramagnetic materials are slightly attracted to the magnet.
  • Ferromagnetism = By applying an external magnetic field, the elementary magnets align themselves in the same direction. The ferromagnetic material itself becomes a magnet. Summary: Ferromagnetic substances are attracted to the magnet.

Susceptibility properties:

  • Describe the ratio of the magnetisation of a material to the magnetic field strength
  • This so-called magnetic susceptibility can be measured with the help of a magnetic balance