23 Large Dramatic Graduated Red & Blue Fire Agate 17mm Tube BeadsAgate is for mental energy and study. Price is for 17 1 2 inch string of these striking beads. Each bead will be slightly different size, shape and colour measure from 17mm x 13mm down to 12mm x 9mm. About 23 beads to the string. What is agate? Agate is nature's most striped gemstone. A variety of microcrystalline quartz that forms in layers and many colours and texture, by filling a cavity in a host rock although it is usually in round nodules with