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Hodgkinson Method Filter

0.50 LBS
  • Product Description


    This item is temporarily Out of Stock.


    Gemstone Characterization without Instruments

    The Hodgkinson Method will not tell you what a gemstone is, but it can often instantaneously tell you what it is not.  It should be the first test you make before starting your identification process.

    This very affordable set of cards will, incredibly, teach you how to use your own eyes to approximate:

    • Refractive Index
    • Birefringence or Double Refraction
    • Dispersion

    Look at it as the most affordable "Refractometer" out there!

    This item typically ships within 1 business day.

  • Product Reviews


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    1. truly brilliant resource

      I have read references to this method, but never really found anything that would help me learn it.
      Until now.
      I am very excited to have found such a well written synopsis of what to do and look for when training your eyes to truly tell you what you are looking at!
      on Jun 22nd 2016

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