Stone Size: 12mm / 1/2 inch long / 1.2 cm longStone Material: Czech glass crystals in pale Citrine YellowSettings: Heavy cast Brass with your choice of Gold, Silver, Antique Gold, or Antique Silver plate, connected at the top to prevent the settings from flipping around and showing the back. Gold Plate is shown.Length: 16" (40.6cm) with a 2" extender chain for flexible sizingCan be ordered with matching dangle earrings! Nickel Free. 12mm necklace, octagon necklace, yellow