Colored Stone Course

 

 


Colored gemstones come in a wide variety of color, size, and quality, and can be polished into many different shapes

Not only diamonds are important to the jewelry professional. What about rubies, sapphires, emeralds and all other beautiful precious and semi-precious gemstones? The importance of colored stones was emphasized by recent gemological conferences held in Antwerp.

Our new practical gemological program addresses the systematic identification of all colored stones, with special attention to the study of inclusions. Is that red stone a ruby, a spinel or a garnet, a red diamond or perhaps just a piece of colored glass?

Three questions will be answered :

  • What is the identity of the specimen?
  • Is the stone natural or synthetic?
  • Is the stone treated or not treated?
Duration: 10 days
Diploma awarded: IGI Colored Stone Grader

Inclusions in colored gemstones are often witness to the origins of the stone, and help in the identification. During the IGI courses, many color slides, and practical sessions with the microscopes on colored stones are provided to broaden the insight and understanding of the study of colored stones.

  • Introduction: color, transparency and cut
  • The refractometer and the polariscope
  • Practice

  • The polariscope
  • The dichroscope
  • The most important optical phenomena
    (chatoyancy, asterism, ...)

  • Natural corundum (ruby and sapphire): properties and inclusions
  • Practice

  • Natural beryl (emerald): properties and inclusions
  • Practice

  • Practice

  • Synthetic rubies from different producers
  • Practice

  • Synthetic sapphires from different producers
  • Practice

  • Synthetic emeralds from different producers
  • Practice

  • Other synthetic gemstones and the identification of treatments
  • Practice

  • Practical test and delivery of the IGI Colored Stone Diploma
   
   
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