Iron is a metal in group VIII of the periodic table with atomic number 26, an atomic weight of 55.85, and a density of 7.86. It has a melting point of 1539 C.

The colors of rubies and emeralds are so striking that they define shades of red and green—ruby red and emerald green. But ...

When a liquid metal cools and turns into a solid, its atoms come together to form crystals. The structure of these crystals is not perfect. Sometimes an extra layer of atoms squeezes between other ...

Both rubies and emeralds are minerals, which is a type of rock with a consistent chemical composition and a highly ordered ...