The primary goal of the Alexandrite Tsarstone Collectors Guide is to establish a comprehensive resource, dedicated to alexandrite gemstone and to create an open community with the free exchange of information. With frequent inquiries about old and inherited alexandrites from Alexandria and other places, the series of articles was written to address and clarify these and other questions about this rare and collectable gemstone as well as provide help with evaluating some common and important aspects of natural alexandrite, avoid fraud, with tips on detecting synthetic and imitation alexandrites and to understand challenge in valuation of alexandrite in terms of its value based on color change, cut, size, color and artistic appeal rather than only on its clarity and price.