Galeries du Diamant

Polished diamond course - HRD Antwerp Diamond Courses

Diamond Grading and Identification: become the HRD Antwerp Certified Diamond Grader




Max. 16


3 weeks


French, English

Learn how to grade diamonds in the diamond capital of the world. You will study the 4 C’s Carat, Colour, Clarity and Cut according to the IDC rules, an international standard for grading polished diamonds introduced and endorsed by the diamond industry’s two leading representative bodies, the World Federation of Diamond Bourses (WFDB) and the International Diamond Manufacturers’Association (IDMA). A guarantee for transparency.

HRD Antwerp highly skilled and experienced lecturers will guide you through the fascinating world of diamonds. You will learn how to detect the most common simulants, and will be able to work with the best microscope in the world and other gemological equipment and at the same time develop impeccable grading skills. HRD Antwerp courses are a perfect balance between theoretical knowledge and practical skills.

Learn more about the IDC rules
Learn more about the D-scope, the best microscope in the world
Apply for polished diamond course

Duration 3 weeks (Antwerp), 3-4 weeks (worldwide)
Requirements Min. 18 years
No previous diamond experience is required
Number Of Attendants Max 16
Target Group Diamond traders, diamond experts
appraisers, graders, jewellers, designers, sales managers,
owners, buyers and job seekers in the diamond sector,
diamond and jewellery-lovers
Course Content
  • Introduction to the properties of diamonds.
  • Explanation of the 4C’s (Carat, Colour, Clarity and Cut).
  • Correct cleaning of diamonds.
  • Diamond Optics. Use of HRD Antwerp stereozoom
  • microscope (D- Scope).
  • Systematic examintation of a diamond. Favourable and unfavourable angles of observation.
  • Principles of weighing, calculation of the carat weight.
  • Identification of external and internal characteristics.Plotting and exercises.
  • Colour determination of diamonds by comparison with master stones.
  • Grading of colour and fluorescence.
  • Clarity grading using the HRD Antwerp D-scope and loupe 10 x with master stones for reference.
  • Cut grading. Determination of proportions, symmetry and polish. Measuring dimensions using a caliper (micrometer).
  • Use of tables for proportions and symmetry.
  • Examination and grading of fancy cuts.
  • Characteristics and properties of diamonds versus imitations (simulants). Including simple tests to distinguish natural diamonds from imitations.
  • Identification of clarity treatments (e.g. crack filling).
  • Introduction to lab grown diamonds and colour treatments.
  • Final examinations.
Course Hours Daily from 8.45 am to 4.45 pm
Lunch break from 12.30 pm till 1.30 pm.
Morning and afternoon coffee breaks.
Examination Theoretical examination: Multiple choice
Practical examination: Students have to examine and grade 8
diamonds correctly.
Diploma Diploma: ‘HRD Antwerp Certified Diamond Grader’
Yours To Keep Diamond course book