Add dashes of dusky color to your designs with the smoky quartz 8x16mm rice beads from Dakota Stones. Available by the strand, these gemstone beads feature a rice shape with ends that taper slightly. They would dress up a long necklace strand beautifully. Smoky quartz is named after its smoky color, which is caused by gamma rays. The color of smoky quartz ranges from brown to black and sometimes smoky gray. Mined in Brazil, the stone is believed to enhance organizational skills, making it good to have around the workplace or home office.