Blue Synthetic Calsilica offers gorgeous patterns that offers more eye-catching beauty the stabilized crystalline material but is not plastic, the colors are solid through the material and the hardness is over 3 inside.  This arrowhead pendant is gorgeous and the vibrant colors work well for spring and western or southwestern designs.  Each pendant is drilled at the top from side to side for easy centerpiece stringing and the hole is big enough for light chain.  A winning combination at this price.  Actual size 18x44mm.  Patterns vary.