These are 8mm A+ grade semi-precious amazonite gemstone dangle beads. There is a little rhodium in the silver earwires which helps prevent and prolong the natural process of tarnishing. These are beautiful. No two pair are exactly alike but they are all A+! The gemstone Amazonite is known as the "hope stone" because it inspires confidence and hope. Semi-precious Amazonite’s healing properties include healing the nervous system and the brain.