Topics
- "Chloromelanite"
- "Smaragdite"
- »Chrysanthemum Stone« & »Flower Porphyry«
- Alexandrite - imitations and misnomers
- Corals
- Feldspar: Like the Sun and the Moon
- Fire opal
- Fissure fillings in gemstones
- Larimar: Imitations and misnomers
- Magnesite - Imitations and Misnomers
- Obsidian: natural product versus artificial glass
- Prasem
- Turquoise - Modifications and Imitations
- What is »Aventurine« ?