Testing the Colour of Gemstones - A Collection of Historical Articles on the Dichroscope Filters Lenses and Other Aspects of Gem Testing

<p><p><strong>A fascinating collection of historical gemology articles that takes readers back to the early 20th century to explore classic colour-testing techniques.</strong></p></p><p><p>Carefully curated from original sources this compact volume explains the use of tools like the dichroscope colour filters lenses and other optical methods to understand and evaluate gemstone colour.</p></p><p><p>Contents include:</p></p><p><ul></p><p><li>Colour Colour Filters and Thedichroscope</li></p><p><li>Dichroism and the Dichroscope</li></p><p><li>Colour of Gem-stones</li></p><p><li>Gem-stones</li></p><p><li>Gems and Gem Materials</li></p><p><li>Colour in Gem Distinction</li></p><p><li>Synthetic Gems</li></p><p><li>Colour</li></p><p><li>Colour Dichroism and Absorption-spectra</li></p><p></ul></p><p><p>Perfect for gem enthusiasts students and collectors interested in both the science and history of gem testing <em>Testing the Colour of Gemstones</em> brings timeless insights into how gemologists studied colour before modern instrumentation.</p></p>