Ever wonder how Earth scientists examine rocks? We cut them up and throw them under a microscope ... and then everything ...

Large crystals found in geodes and other rocks are relatively rare ... Silicates—including quartz, mica, olivine, and precious minerals such as emeralds—are the most common class of minerals ...

Pure quartz, or “rock crystal” from Brazil ... Quartz is the second-most abundant mineral in the continental crust, and is present both as visible crystals, ranging in size from immense ...

The goal of the show is to educate people on the many things rocks can be used for and to create more rock enthusiasts.

Right: OH-defects in young (0.3 Gyr) Variscan granites are one order of magnitude higher than in old (0.9-1.8 Gyr) Proterozoic granites from Scandinavia . The OH-content is reflected in recent ...