You will appreciate what are diamonds? Why diamond is valuable? How to grade a diamond? That is the 4c’s – clarity, colour, cut and carat weight. How to make full use of a handle i.e. loupe from quality grading to identification of its authenticity. You will learn to use a loupe to look at the the internal inclusions and external blemishes of diamond. How inclusions and surface blemishes could affect the clarity grade? Lighting also play an importance part in grading and how you can observe inclusions within a diamond using proper lighting. Quality of colour in diamond is an important factor. You will also learn how to colour grade diamond using comparison methods assist by diamondlite instrument. Quality of cut bring out the brilliance of diamond. You will learn what is an ideal cut diamond, its hearts and arrows effect is very much influence by its crown and pavilion angle, and its proportion of the each facets. What to look out for poor cut versus well cut diamond? As imitation and synthetic diamonds are in the market place, you will need to learn the special external and internal features of cubic zirconia (CZ), synthetic moissanite and also synthetic diamonds. Practical sessions will help you to reinforce your identification and grading skill. Of course, pricing is important to our trade, and you will learn how to read an international diamond grading reports and how you can relate that to Rapaport Diamond Price guide.
- What are diamonds?
- Chemical and physical properties of diamonds
- Why diamonds are valuable?
- Grading faceted diamonds.
- Instrument like loupe, microscope, diamondlite and ultraviolet lighting to help you grade diamonds.
- What is clarity in diamonds? Clarity grades & its characteristics, definition of clarity grades and grading procedures.
- Colour grading – use of diamondlite, colour comparison method and master eye effect.
- Fluorescence – its influence on the colour of diamonds.
- Cut grading – History of cut of diamond; round brilliant to fancy cut diamond; well cut versus poorly cut diamond; what is hearts and arrows? Ideal proportion of diamonds, how you can estimate the crown angle, pavilion depth and table percentage methods.
- Carat weight – weighing scale and estimation method.
- How you can grade a mounted diamond?
- How identify natural from imitation diamonds like cubic zirconia and synthetic moissanite?
- What is synthetic diamond and its internal features that could be useful to separate it from natural diamond.
- Treated diamonds like glassy filling and irradiated diamond, what to look to look out for?
- International diamond grading reports like GIA, HRD and AGS.
- Rapaport Diamond Report, its international pricing.