
A HAND-BOOK OFPRECIOUS STONES
PREFACE.
What are Precious Stones?
Physical Characters. - CRYSTALLIZATION.
Optical Properties. - REFRACTION.
Colors.
Lustre.
Streak.
Hardness.
Specific Gravity.
This compact guide offers a practical introduction to the world of gemstones, aimed at anyone from seasoned jewellers to curious hobbyists. It explains the essential qualities that make a mineral “precious”—hardness, beauty, and rarity—while showing how simple tests like specific gravity, hardness, and dichroism can help identify even the most elusive stones.
The book walks readers through the physical and optical characteristics of a broad array of gems, from classic diamonds and rubies to the lesser‑known beryls, tourmalines, and opals. Clear descriptions of crystallization, cleavage, refraction and other properties are paired with easy‑to‑follow instructions for cutting, polishing, and evaluating each stone’s sparkle and color.
Beyond the technical details, the author highlights how fashion and market trends have shaped the value of gems over time, encouraging a deeper appreciation for both famous and humble minerals. Whether you’re assessing a raw crystal or admiring a polished jewel, this handbook makes the science of gemstones accessible and engaging.
Language
en
Duration
~1 hours (113K characters)
Publisher of text edition
Project Gutenberg
Credits
Produced by Paul Marshall and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive)
Release date
2019-10-17
Rights
Public domain in the USA.
Subjects

Born in Frankfurt’s Jewish quarter in the 18th century, he built the business that grew into the famous Rothschild banking dynasty. His rise from a small trading and coin-dealing business to a powerful family firm helped shape European finance for generations.
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