This piece has been purchased and remains in this collection for the purpose of art. Approx 2 inches, wrapped in oxidized copper, includes 20 inch necklace cord.  To request an 18" or 24" cord, simply leave a note to seller at checkout. Plume Agate gets its name from the patterns of mineral growths within the silicates. The shapes of these minerals look more like feathers, flowers, or flames rather than trees like Moss or Dendritic Agate. Agate enhances mental function, improving concentration, perception and analytical abilities. It soothes and calms, healing inner anger or tension and creates a sense of security and safety.