Turn your jewelry into one-of-a-kind wonders with the riverstone 15x20mm rectangle beads. Riverstones receive a natural polish from water and rocks moving against them. They have an organic look you'll love adding to earthy designs. The rectangular shape of these beads perfectly shows off the unique colors and patterns of each bead. Gemstone beads are the perfect way to add natural beauty to your jewelry designs. Since gemstones are formed naturally, each bead is a unique treasure. These gorgeous gemstone beads are available by the strand, so you'll have plenty to work with.