Gem-Stones and Their Distinctive Characters

This compact reference brings the science of gemstones into the hands of anyone curious about the glittering world of jewellery. It walks readers through the essential physical characteristics—refractive index, specific gravity, and crystal structure—explaining how each property helps distinguish a genuine stone from its imitations. The author balances clear, everyday language with just enough technical detail to make the methods both understandable and useful for beginners and seasoned jewelers alike.

Practical guidance fills the pages, from using a simple refractometer to performing heavy‑liquid tests, all supported by clear diagrams and thirty‑two illustrative plates, three of them in colour. Detailed tables of constants let listeners quickly verify a stone’s identity, while vivid sketches of famous diamonds and other prized gems add visual interest. Whether you’re a collector, a dealer, or simply fascinated by the allure of cut stones, the book offers a trustworthy toolkit for exploring the hidden qualities that make each gem unique.