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...systems...Minerals and the crystalline state: 1 Introducing crystals - Three distinct types of crystal, each of which is a different mineral, can be seen in the granite shown in Figure 1: shiny black biotite mica; cloudy white feldspar and translucent grey quartz. Figure 1 A close-up of a piece of granite, 7 cm across, showing interlocking, intergrown crystals of several...

...think about taking other courses...Introduction and guidance: How to get a badge - Getting a badge is straightforward! Here’s what you have to do: read each session of the course score 50% or more in the two badge quizzes in Session 3 and Session 6 For all the quizzes, you can have three attempts at most of the questions (for true or false type questions you usually...