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.
It is a thorough article that covers the largest crystals of most common minerals. The largest crystal documented of any mineral is a beryl crystal from Malakialina, Malagasy Republic that measured 18 meters long, 3.5 meters diameter, estimated volume of 143 cubic meters and an estimated weight of 380,000 kilos.