Put accents of dusky color into your designs with the smoky quartz 4mm faceted roundel beads from Dakota Stones. Available by the strand, these gemstone beads are rounded and feature diamond-shaped facets cut into the surface, adding even more shine. These small beads would make nice spacers in necklace and bracelet designs. 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.