An epic rock formation near the town of Denmark is the state’s newest viral sensation Western Australia is a wild and ...

Large crystals found in geodes and other rocks are relatively rare ... iron, marble, and granite. Silicates—including quartz, mica, olivine, and precious minerals such as emeralds—are the ...

Obsidian has crystals which are so small that they are impossible to see without a microscope. Intrusive igneous rocks are formed by magma that has cooled slowly, deep underground. Granite is an ...

Each type of mineral has a unique crystal structure ... which is found across the world and in different rocks, such as granite and quartzite, Anderson said. Quartz is made of the chemical ...