Sales Expertise

General definitions, formation, properties and features as well as application of gemstones. details...

Criteria of gemstone evaluation and types of workmanship around gemstones. details...

Properties and features of diamond, basics of diamond grading, practical clarity and colour grading. details...

Their compositions, natural origins, artificial treatments, detection of imitations and correct nomenclature are also covered. The Pearls/Organic Substance Programme ends with the final exam on the last day. details...