Turn your jewelry into one-of-a-kind wonders with the Indian aventurine 15x20mm rectangle beads. Aventurine is known as the stone of chance or luck. It is a quartzite usually containing mica. 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.