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.
Apophyllite is common worldwide in many basalt and diabase quarries, though large, well-formed crystals are limited to several important localities. By far, the largest crystals are from the Deccan Traprocks of India, and can be found in abundance in the zeolite-producing basalt quarries there.