Introduction to Coloured Gems and Diamonds
  • Introduction by Tanja Sadow
  • What is a Gem?
  • Naming Gemstones
  • Identifying Gemstones
Factors Affecting Gemstone Value
  • What are the factors that affect the value of gemstones?
  • The Importance of Colour to Value
  • Evaluating Gem Colour: Hue Differences
  • Evaluating Gem Colour: Tone Differences
  • Evaluating Gem Colour: Saturation
  • Evaluating Gem Colour: Distribution of Colour
  • Colour Grading ‘Colourless’ Diamonds
  • Clarity in Coloured Gems: Type 1, Type 2 and Type 3 Gems
  • Observing Internal Characteristics
  • The GIA Clarity Grading System
  • CARAT Weight
  • Cutting Diamonds and Coloured Gems
  • The importance and the impact of Cut to Gem Value
Conclusion
  • Thank you for participating!