Many people would see this rock on the side of a trail and just keep walking. However, in my experience every rock has a surprise inside if you take the time to look. This rock was no exception. The cut and polished surface is striking with the bright white quartz contrasting against the dark black basalt. The greenish colors showing in the middle suggest this basalt was partially metamorphosed providing even more color and character to this specimen. To wrap it up the red, yellow and orange tones of the iron oxidation around the rock creates a beautiful display of texture and color.
Rock type: Basalt, likely metamophosed
Chemical composition: The exact composition of this rock is unknown, but based on the colors it likely contains quartz (SiO2), iron containing minerals and some green minerals resulting from metamorphic processes.