1. The Corlia Roberts Institute of Diamonds offers several courses related to rough diamonds. Here is an overview of these courses:

Rough Diamond Grading Course: This course teaches students how to grade and analyze rough diamonds based on the four Cs: carat weight, clarity, color, and cut.

Rough Diamond Evaluation Course: This course is designed to teach students how to identify and evaluate different types of rough diamonds. Students will learn how to determine a diamond’s potential value and how to plan the best cutting and polishing strategy.

Rough Diamond Assortment Course: In this course, students will learn how to sort and categorize rough diamonds based on their size, shape, quality, and color.

Rough Diamond Planning Course: This is an advanced course that teaches students how to create a detailed cutting plan for rough diamonds. Students will learn how to use the latest technology, such as computer-aided design (CAD), to optimize the yield and maximize the value of each stone.

All these courses are practical and hands-on, taught by experienced diamond professionals. They are suitable for beginners as well as industry professionals looking to enhance their skills and knowledge.

2. Harry Oppenheimer Diamond Training School – They also offer various courses related to diamond processing, grading, and evaluation.

3. The Gem Lab- This institution offers A choice of five hands-on, practical courses and gemstone certification, and appraisals, they are based in Cape Town.

4. The Diamond Education College – This institution offers a wide range of courses related to diamond processing, grading, and valuation also based in Bedfordview South Africa

The South African Diamond and Precious Metals Regulator – This is a government regulatory body for diamond licensing and permits for Jewellers.

These above are just a few of the many institutions in South Africa that offer courses related to rough diamonds.