Denim Blue Sponge Coral Flat Oval Beads - Large 18mmPrice is per 16 inch of these unusual beads each measures 18mm x 14mm x 7mm. The beads are in oval shape but both sides are flat. As with all non white coral, these are dyed, but the colour doesn't come off! Sponges and true corals come from different sea creatures. Sponges look like a sponge with short protrusions. Sponge coral beads are made from their skeleton. It was once believed sponge coral prevented ill fortune and can be used to prophesize.