Please te that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Diamonds may be a girls best friend, but there are many other beautiful gemstones to be had. This book shows the characterization of different gemstones, and provides and overview of many different natural and synthetic stones including diamonds, sapphires, emeralds and rubies. Project Webster represents a new publishing paradigm, allowing disparate content sources to be curated into cohesive, relevant, and informative books. To date, this content has been curated from Wikipedia articles and images under Creative Commons licensing, although as Project Webster continues to increase in scope and dimension, more licensed and public domain content is being added. We believe books such as this represent a new and exciting lexicon in the sharing of human kwledge.