Ruby – Sapphire – Emerald, The Big 3 (Online)
OnlineA Professional Online Coloured Gemstone Gemology & Identification Course Starting immediately, gem aficionados, jewellery professionals and aspiring gemologists can study the world’s most precious and most traded...
- Introduction to The Big 3 Gemstones The importance
- Formation, Sources & Mining Geological formation
- Mineralogy & Gemstone Classification Chemical composition
- Physical & Optical Properties Hardness, refractive
