
Before they are cut and polished into gems, birthstones are natural crystals. Take a look at examples of each of the beautiful birthstone minerals: January Birthstone – Garnet [Chemical Formula X3Y2(SiO4)3] Color: any, but birthstone is usually red Hardness: 6.5 to 7.5 Crystal Habit: Cubic or Rhombic Dodecahedron The traditional […]