Colored gemstones are beautiful, and their beauty is an important part of what makes them valuable. Some come in colors that are so striking that their names are part of common color descriptions—”ruby red,” “sapphire blue” and “emerald green.” But ruby, sapphire, and emerald—the Big 3—are just a few of the multitude of gems that you might encounter in a busy gem-trading office. It’s important to be able to judge them all. Rarity also plays an important role in gem value. With this book GIG Academy provides the knowledge tools to understand, grade and give a value to colored gemstones. The book places special focus on the “Big Three” of the gemstone world: ruby, sapphire, and emerald.