EOSC 118 Lecture Notes - Lecture 7: Gemstone, Crystal Habit, Chemical Formula
15 Dec 2017
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By the end of this lesson, learners will: In a previous lesson on key geoscience concepts, we talked quite a bit about rocks. We looked at the structure of the earth, the three main types of rocks (sedimentary, igneous, and metamorphic), and examples of all those types. From the readings, you will have learned that each rock example (such as granite or schist) has a characteristic mineral content (mineralogy) and elemental content (geochemistry). In this lesson, we will learn about the constituent minerals of rocks through the lens of mineralogy and crystallography. If you felt lost when we were talking about elements and compounds, it might be wise to refresh yourself with that material. Before continuing, remember that rocks are essentially aggregates of minerals, and that a mineral is a naturally occurring homogeneous solid with a definite (but generally not fixed) chemical composition and a highly ordered atomic arrangement. Our textbook readings cover much of the basic scientific material.
