Gem-A Education

The Gemmological Association of Great Britain can trace its origins back to 1908. The world’s first qualifying Gemmology course originated in London and the first Gemmology diploma was awarded in 1913.

The first Gemmology Correspondence Course followed in 1921. The Association became an independent organization in 1931 and combined with the Gem Testing Laboratory of Great Britain in 1990 to form 'GAGTL' . These initials were replaced by the 'Gem-A' logo in 2001. The Gem-A headquarters is situated close to Hatton Garden in central London and contains the Education office, Gem Tutorial Centre, Membership office, Gem Testing Laboratory and Gem-A Instruments.

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Why Study with Gem-A

  • Gem-A is a leading provider of gemstone and diamond education worldwide.
  • Gem-A provides a tradition of educational excellence, maintaining the high standard of the world’s original gem diploma which was first awarded in 1913.
  • Gem-A provides a good practical grounding in the knowledge and enjoyment of gems.
  • Gem-A provides courses balanced to suit both the beginner and those already involved with gems.
  • All Gem-A practical courses are based firstly on observation using the eye and the ten-power pocket lens and correct lighting, as this is the most important and fundamental aspect of testing any gemstone.

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Main Gem-A Courses

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How to study

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Gem-A examinations

  • Gem-A has two main examination sessions every year in January and June.
  • A different Examination Entry Form is issued for each examination session. Final dates
    for entry are 31st March for the June examinations and 31st October for the January examinations. No late entry is accepted.

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Presentation of Awards and Diplomas

  • Our prestigious Presentation of Awards ceremony is held annually in October or November at the historic Goldsmiths’ Hall in London .
  • Diploma recipients who sat their examination in either January or June may attend the ceremony, together with the Foundation prizewinners.
  • Invitations will be sent to all those who have achieved their Gemmology and Gem Diamond Diplomas within the previous year (both January and June examination sessions).
  • Diplomas, prizes and medals will be presented during the ceremony by the Association's guest of honour.
  • Invitations are extended to family and friends - this is a wonderful opportunity for the Association and it's students from around the world to meet together, and within such historic surroundings.
  • A special dinner and presentation for students in East Asia was hosted in Hong Kong on 23rd September 2007. Click here for more information

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©2004 Gemmological Association and Gem Testing Laboratory of Great Britain