Accurately evaluating and pricing coloured gemstones requires a structured, systematic approach. Unlike diamonds, coloured stones lack a single standardised international grading scale, which makes commercial valuation challenging. This course introduces a clear, repeatable grading framework that allows you to assess colour, clarity, and cut parameters objectively, giving you the skills to price gemstones accurately and trade with confidence.
This coloured stone grading system was developed by Ian Campbell FGA and launched in 1982. It has stood the test of time as being the most detailed but simple grading system I have ever come across. I have bought, sold, graded and valued coloured stones for the past 30 years using this system.
Whether you are a retail jeweller, gemstone buyer, salesperson, or enthusiast, this practical course bridges the gap between raw gemmological observation and real-world market value.
Course Content
- Systematic Colour Evaluation: Master the three pillars of gemstone colour analysis—Hue (the body colour), Tone (lightness to darkness), and Saturation (purity and intensity).
- Clarity Categorisation: Learn how clarity grading varies by gem species (Type I, Type II, and Type III gemstones) and how to evaluate inclusions based on visibility and location.
- Proportion & Cut Quality: Assess cut symmetry, brilliance, windowing, and extinction to determine how lapidary execution impacts value.
- Commercial Pricing Frameworks: Translate quality grades directly into commercial price estimations to make informed buying decisions and protect profit margins.
Standalone & Bonus Integration
Included Free with Gemstone Identification Courses: While available here as a standalone program, this course is automatically included at no extra charge when you enroll in either the In-Person or Online Basic Gemstone Identification Course.
Course Details & Format
Format: 100% Online & Self-Paced
Price: R350.00 (or FREE with any Basic Gemstone Identification course enrollment)
Prerequisites: None required. Ideal for jewellers, buyers, salespeople, and collectors looking to master stone valuation.
