This book is the first published work to illustrate the commercial aspects of these magnificent gems without compromising the interests of any party throughout the supply chain. “The Layer System” presented in this book is a unique approach to illustrate the many impactful commercial characteristics absent from the GIA gemological report. Each attribute is represented as a “layer”, each layer is a chapter in the book and each chapter is accompanied by magnificent images and sketches that visually articulate the text.
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