Chapter 1
Alexandrite gemstone buyer and collectors guide. Chapter 1. Insidious siberian. Overview of the historical background and the general social conditions when alexandrite was discovered and the affect they had on the stone´s name and the gemstone&acuthttp://www.alexandrite.net/chapters/chapter1/index.html
Chapter 4
Alexandrite gemstone buyer and collectors guide. Chapter 4. Classification and properties. Detailed information regarding the physical, chemical, optical properties, mineralogy and gemology of chrysoberyl.http://www.alexandrite.net/chapters/chapter4/index.html