Diamonds are minerals composed of carbon that come from deep volcanic eruptions in the Earth's mantle and were formed billions of years ago.

From white sand beaches to black sand beaches, and even multicolored sand beaches - Earth has it all! Where does the sand color come from? What gives sand its color? The white sand beaches are made up of pure quartz, the pink sand beaches get their color from foraminifera, the red sand beaches, green sand beaches, gray sand beaches, and black sand beaches get their colors from the different ingredients in the lava from volcanic eruptions. Purple sand beaches are based on diff

The Naica Cave of Crystals, home to giant selenite crystals, is one of the most fascinating, yet potentially deadly, places on Earth.