13.1. Learning Objectives EOSC 118 99C 2021WC Earth's Treasures Gold and Gems.pdf

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13.1. Learning Objectives Module B. Precious Gemstones Lesson 13: Colour, Light and Optics 2 Learning Objectives By the end of this lesson, you will be able to... 1. Differentiate between isotropic and anisotropic minerals. 2. Describe the three main mechanisms of colour generation for gemstones. 3. Describe the optical effects of asterism, chatoyancy, iridescence, and labradorescence. 4. Describe the five main groups of transparency. Required Readings None Optional Readings Naussau, K. (1978)The Origin of Color in Minerals () () ,American Mineralogist. Fritsch, E. & Rossman, G.R. (1987)An update on color in gems. Part 1: Introduction and colors caused by dispersed metal ions ()
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