That is, if you observe the spectrum of a star and can determine the wavelength where the emission peaks (Î»max), you can calculate that starâs temperature. Here is another copy of the plot that we studied in Lesson 3: Figure 4.1: Two-dimensional plot of the spectrum of a blackbody with different temperatures.
Igneous rocks usually contain the most crystals. The longer it takes the magma to cool, the larger the crystals.
Emerald and Sapphire are such examples, as are some large specimens of quartz. The largest of this type are metres in length! (Gypsum crystals.) Where the solute fluid is say a sulphide, then the mineral may be deposited in a rock fracture as a mineral vein. Examples are zinc, antimony, and so on.