Translation of comer. On the contrary, Swiss like to isolate themselves from the rest, maybe because the believe that they are superior or better, or maybe because they are just afraid of the unknown, change is not happening.ranslation of comer. On the contrary, Swiss like to isolate themselves from the rest, maybe because the believe that they are superior or better, or maybe because they are just afraid of the unknown, change is not happening.
Dark colored igneous rocks are high in iron and other heavier elements: ma-fic, magnesium-iron. Light color igneous rocks are high in aluminum and potassium. .ou need to understand one of the fundamental differences between mafic and felsic rocks. Mafic rocks contain larger amounts of Mg and Fe than felsic rocks. The atomic weights of Mg and Fe are higher than Al, Si, and O, therefore they tend to be heavier. Very simple concept.
Quartz: the dark gray, glassy grain is quartz. Quartz is also a very common mineral in some igneous rocks. It can be difficult to recognize since it doesn't look like the beautiful, clear hexagonal-shaped mineral we see in mineral collections or for sale in rock shops. In igneous rocks it is often medium to dark gray and has a rather amorphous shape.